# Mathematics Grade 9 ANA 2014 Memo (English)

> Grade 9 Mathematics memorandum from the ANA 2014 (English), 9 pages. Read online or get the free PDF download, question paper linked when available.

- Page: https://www.hlayiso.com/library/2014-ana-grade-9-mathematics-english-memo/140bb171-caf1-4f14-9cf4-821b44ca5a42
- Updated: 2026-09-27
- Subject: Mathematics
- Grade: Grade 9
- Language: English
- Document type: Memorandum
- Year: 2014
- Exam period: ANA
- Curriculum: CAPS
- Pages: 9

Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 9](https://www.hlayiso.com/library/grade-9) › [Mathematics](https://www.hlayiso.com/library/grade-9/mathematics) › [Mathematics Grade 9 ANA 2014 Memo (English)](https://www.hlayiso.com/library/2014-ana-grade-9-mathematics-english-memo/140bb171-caf1-4f14-9cf4-821b44ca5a42)

## About this document

Mathematics · Grade 9 · ANA · 2014 · English. Memorandum, 9 pages. Read online or download the PDF.

Read it free online on the page above; download the PDF from there.

## Document text

Text extracted from the PDF. Layout, diagrams and tables may not survive extraction.

### Page 1

Downloaded from hlayiso.com
                                                                                                                                Page 1 of 9

                                                                                     ANNUAL NATIONAL ASSESSMENT 2014
                                                                                          GRADE 9 MATHEMATICS

                                                                                               MEMORANDUM

                                                    This memorandum consists of 9 pages.
Important Information:
• This is a marking guideline. In instances where learners have used different but mathematically sound strategies to solve
          the problems they (learners) should be credited.
•         Unless stated otherwise, learners who give a correct answer only, should be awarded full marks.
•         Underline errors committed by learners and apply Consistent Accuracy (CA) marking.
•         Do not penalise learners if units of measurement are omitted.
                                KEY
    M                    Method mark
    CA                   Consistent Accuracy mark
    A                    Accuracy mark

QUESTION 1

                1.1          D        1.2       C     1.3    B     1.4   A    1.5      D
    1.                                                                                       Give 1 mark for each correct answer.
                                                                                                                                       [10]
                1.6          C        1.7       C     1.8    D     1.9   B    1.10     D

QUESTION 2
    2.1         2,07 × 10−7 A                                                                                     Answer: 1 mark        (1)

    2.2.1       3
                �73 − (−3)2 = √73 − 9
                                            3
                                                                                                                 Calculation: 1 mark
                              3
                            = √64 M                                                                                Answer: 1 mark
                                                                                                              (Answer only: 1 mark)
                            = 4CA                                                                     (If the answer is a decimal
                                                                                                                number, no mark )       (2)
    2.2.2       √100 < √110 < √121 M                                                                    √100 and √121: 1 mark
                  10 < √110 < 11 A                                                                              Answer: 1 mark         (2)
                                                                                                           (Answer only: 1 mark)
    2.2.3       3×59
                          = 3 × 52 M
                    57                                                                            Applying exponential law: 1 mark
                          = 75CA                                                                                  Answer: 1 mark
                                                                                                             (Answer only: 1 mark)      (2)
    2.3                          −2
                1, 03 × 10 + 3, 8 × 10               −3

                = 0,0103 + 0,0038 M                                                                          Simplification: 1 mark
                = 0,0141 CA                                                                                       Answer: 1 mark
                                                                                                             (Answer only: 1 mark)
                or                                                                                                                or
                = 10−2 (1,03 + 0,38) M                     or   = 10−3 (10,3 + 3,8) M         Taking out common factor: 1 mark
                = 10−2 (1,41)                                    = 10−3 (14,1)
                = 0,0141 CA                                     = 0,0141 CA                                     Answer: 1 mark
                                                                                                             (Answer only: 1 mark)
                                                                                                                                        (2)
                                                                                                                                        [9]

Grade 9 Mathematics Memo                                                                                          Page 1 of 9

### Page 2

Downloaded from hlayiso.com
                                                                                                                     Page 2 of 9

QUESTION 3
 3.1    2(𝑥 + 2)2 − (2𝑥 − 1)(𝑥 + 2)                                                         Squaring a binomial: 1 mark
        = 2(𝑥 2 + 4𝑥 + 4) − (2𝑥 2 + 3𝑥 − 2) M                                            Product of 2 binomials:1 mark
        = 2𝑥 2 + 8𝑥 + 8 − 2𝑥 2 − 3𝑥 + 2 M                                                         Simplification: 1 mark
                                                                                                         Answer: 1 mark
        = 5𝑥 + 10 CA

        or                                                                                                            or
        = (𝑥 + 2)(2(𝑥 + 2) − (2𝑥 − 1)) M                                           Taking out common factor (𝑥 + 2):
        = (𝑥 + 2)(2𝑥 + 4 − 2𝑥 + 1) M                                                                              1 mark
                                                                                         2(𝑥 + 2) − (2𝑥 − 1):1 mark
        = (𝑥 + 2)(5) or 5𝑥 + 10 CA
                                                                                                   Simplification: 1 mark
                                                                                                        Answer: 1 mark        (4)

 3.2    15𝑥 2 𝑦 3 +9𝑥 2 𝑦3                          or    15𝑥 2 𝑦 3       9𝑥 2 𝑦 3                 Simplification: 1 mark
                                                                      +                                 Answer: 1 mark
                 8𝑥 2 𝑦 3                                 8𝑥 2 𝑦 3        8𝑥 2 𝑦 3
             24𝑥 2 𝑦 3                                      15     9
        =     M                                          =       + M
             8𝑥 2 𝑦 3                                         8       8
                                                              24
        = 3 CA                                           =
                                                              8                                                               (2)
                                                          = 3 CA
 3.3     𝑥 2 −4𝑥
        𝑥 2 −2𝑥−8                                                                                    𝑥(𝑥 − 4): 1 mark
            𝑥(𝑥−4)
        = (𝑥−4)(𝑥+2) M                                                                       (𝑥 − 4)(𝑥 + 2): 1 mark
                                                                                                             𝑥
           𝑥                                                                                                     : 1 mark
        =                CA                                                                                𝑥+2
             𝑥+2                                                                                                              (3)

 3.4    𝑥2
             +
                 2𝑥 2
                         −
                                 7𝑥 2
        2            3            6                                                           3𝑥 2 + 4𝑥 2 − 7𝑥 2 :1 mark
             3𝑥 2 +4𝑥 2 −7𝑥 2
        =                                   M                                           Common denominator 6: 1 mark
                         6                                                                               Answer: 1 mark
             0
        =                                                                            (If the expression is treated as an
             6
                                                                                         equation, no mark i.e × by 𝟔)
        = 0 CA
        or                                                                                                            or
        𝑥2       2𝑥 2            7𝑥 2
             +           −
        2       3                 6
             3𝑥 2            4𝑥 2           7𝑥 2
        =                +              −           M                                   Common denominator: 2 marks
                 6               6           6                                                           Answer: 1 mark
             0
        =                                                                            (If the expression is treated as an
             6
                                                                                         equation, no mark i.e × by 𝟔)
        = 0  CA                                                                                                              (3)
 3.5    6𝑥   2
             3𝑦              3
           ×
        7𝑥𝑦 2𝑥
             9𝑦2                                                                                            9𝑦 2 : 1 mark
        =            A
              7                                                                                               7: 1 mark

        or                                                                                                            or
             18𝑥 2 𝑦 3
        =
              14𝑥 2 𝑦
             9𝑦2                                                                                            9𝑦 2 : 1 mark
        =            A                                                                                      7: 1 mark       (2)
              7

                                                                                                                            [14]

Grade 9 Mathematics Memo                                                                               Page 2 of 9

### Page 3

Downloaded from hlayiso.com
                                                                                                  Page 3 of 9

QUESTION 4
4.1   3𝑥 2 𝑦 − 9𝑥𝑦 2 + 12𝑥 3 𝑦 3                                              3𝑥𝑦: 1 mark
      = 3𝑥𝑦(𝑥 − 3𝑦 + 4𝑥 2 𝑦 2 ) A                                𝑥 − 3𝑦 + 4𝑥 2 𝑦 2 : 1 mark
                                                                                                         (2)
4.2   2(𝑥 + 𝑦) − 𝑡(𝑥 + 𝑦)                                                    (𝑥 + 𝑦): 1 mark
                                                                             (2 − 𝑡): 1 mark             (2)
      = (𝑥 + 𝑦)(2 − 𝑡) A
4.3   4𝑥 2 − 𝑦 2                                                           (2𝑥 − 𝑦): 1 mark
      = (2𝑥 − 𝑦)(2𝑥 + 𝑦) A or (2𝑥 + 𝑦)(2𝑥 − 𝑦) A                       (2𝑥 + 𝑦): 1 mark              (2)

4.4   𝑥 2 − 11𝑥 + 18                                                         (𝑥 − 9): 1 mark
      = (𝑥 − 9)(𝑥 − 2)) A or (𝑥 − 2)(𝑥 − 9)A                             (𝑥 − 2): 1 mark             (2)

                                                                                                         [8]

QUESTION 5

5.1        (𝑥 − 2)2 + 3𝑥 − 2 = (𝑥 + 3)2                                𝑥 2 − 4𝑥 + 4: 1 mark
      𝑥 2 − 4𝑥 + 4 + 3𝑥 − 2 = 𝑥 2 + 6𝑥 + 9 M                         𝑥 2 + 6𝑥 + 9: 1 mark
                  𝑥 2 − 𝑥 + 2 = 𝑥 2 + 6𝑥 + 9                           Simplification: 1 mark
                                                                             Answer: 1 mark              (4)
                         −7𝑥 = 7 
                           𝑥 = −1 CA

5.2   𝑥 2 − 5𝑥 − 6 = 0
                                                                              Factors: 1 mark
      (𝑥 − 6)(𝑥 + 1) = 0 𝐌    𝐨𝐫 (𝑥 + 1)(𝑥 − 6) = 0𝐌
      𝑥 − 6 = 0 or 𝑥 + 1 = 0          (𝑥 + 1) = 0 or (𝑥 − 6) = 0
       𝑥 = 6 or 𝑥 = −1CA                    𝑥 = −1 or 𝑥 = 6CA
                                                                        Both answers: 1 mark             (2)

5.3         𝑥+2 𝑥−3
                  −       =0
               3      4
      × by 12:
       4(𝑥 + 2) − 3(𝑥 − 3) = 0 M                                  Multiplying by LCD: 1 mark
          4𝑥 + 8 − 3𝑥 + 9 = 0 M                                         Simplification: 1 mark
                                                                               Answer: 1 mark            (3)
                         𝑥 = −17CA

                                                                                                         [9]

Grade 9 Mathematics Memo                                                         Page 3 of 9

### Page 4

Downloaded from hlayiso.com
                                                                                                     Page 4 of 9

QUESTION 6

6.1          Position in the                   1                2   3      4                      5
             sequence (𝑛)
             Term (𝑇𝑛 )                        1                8   27   64A                 125A

                                                                                                            (2)
6.2      𝑇𝑛 = 𝑛 A 3
                                                                                  Answer: 1 mark            (1)

6.3      𝑇𝑛 = 512                                                            Substitution : 1 mark
         𝑛3 = 512 M                                                             Answer: 1 mark
                        3
         𝑛3 = 83 or 𝑛 = √512                                             (If 𝑻𝒏 ≠ 𝒏𝟑 1 mark for
                                                                          substitution from 6.2)            (2)
         ∴ 𝑛 = 8 A
                                                                                                            [5]

QUESTION 7

7.1.     Gradient =
                           𝑐ℎ𝑎𝑛𝑔𝑒 𝑖𝑛 𝑦 𝑣𝑎𝑙𝑢𝑒
                                               M
                           𝑐ℎ𝑎𝑛𝑔𝑒 𝑖𝑛 𝑥 𝑣𝑎𝑙𝑢𝑒                                        Formula: 1 mark
                           5−0
                       =
                           0−1
                               M                                               Substitution : 1 mark
                       =
                            5                                                       Answer: 1 mark
                           −1                                                  Answer only: 3 marks
                 = −5 A                                                                                    (3)
7. 2     𝑦 = −5𝑥 + 5 CA                                                                −5: 1 mark
                                                                                         +5: 1 mark         (2)
7.3      Gradient = −5 (parallel lines have equal gradients) CA                     Answer: 1 mark         (1)

                                                                                                            [6]

QUESTION 8

8.1      Decreased mass = 240 − �
                                               15
                                                    × 240� 𝑘𝑔
                                            100
                                = (240 − 36) 𝑘𝑔 A                                     36: 1 mark
                                = 204 𝑘𝑔 A                                         Answer: 1 mark
         or                                                                                        or
         Decreased mass = 85% of 240 𝑘𝑔
                          17                                                             17
                       = � × 240� 𝑘𝑔  A                                                  : 1 mark
                                   20                                                   20
                                = 204 𝑘𝑔  A                                        Answer: 1 mark
                                                                                                            (2)
8.2          Number of litres=
                                  420 𝑘𝑚
                                       CA                                          420 𝑘𝑚
                                                                                              : 1 mark
                                  12 𝑘𝑚/𝑙                                           12 𝑘𝑚/𝑙
                                = 35 A                                             Answer: 1 mark          (2)
8.3      Number of boys: number of girls : total number
         =       5 ∶          6          ∶        11                                      5
                                                                                          : 1 mark
                                                                                         11
         Number of boys = 𝐀 × 44M
                           5
                                                                                     × 44: 1 mark
                                 11
                                                                                                            (3)
                                = 20 A                                             Answer: 1 mark

Grade 9 Mathematics Memo                                                            Page 4 of 9

### Page 5

Downloaded from hlayiso.com
                                                                                                                  Page 5 of 9

8.4      Neither direct nor indirect proportion. A                                      Neither direct nor indirect
                                                                                                proportion: 1 mark
         Reason: Area ≠ a constant x length and Area x length ≠ a constant.                      Reason: 1 mark
                                                                                Note:
                                                                                                  Direct proportion
                                                                                with explanation (as the side of the
                                                                                         square increases the area
                                                                                                increases): 1 mark
                                                                                (If answer is indirect proportion,
                                                                                                          no mark)       (2)
8.5            𝑆𝐼 =
                      𝑃.𝑛.𝑟
                              M                                                                  Formula: 1 mark
                      100

                      𝑅4 000(𝑛)(3)
                                                                                           Substitution 𝑆𝐼: 1 mark
             𝑅840 =
                            100
                                     M
         84 000 = 12 000𝑛 M                                                                Substitution 𝑃: 1 mark

                      84 000                                                                 Substitution 𝑟: 1 mark
                𝑛=
                      12 000

                𝑛 = 7 A                                                                       Calculation: 1 mark

         Number of years= 7                                                                        Answer: 1 mark

         or                                                                                                      or
              𝐴 = 𝑃 + 𝑆𝐼
                                                                                                  𝑅 4840 : 1 mark
              𝐴 = 𝑅 4840 A
                𝐴 = 𝑃(1 + 𝑛𝑖) M
         𝑅4 840 = 𝑅4 000(1 + 𝑛 � �) M
                                        3
                                                                                                  Formula: 1 mark
                                100
         𝑅4 840 = 𝑅4 000(1 + 𝑛(0,003))                                                      Substitution 𝑃: 1 mark
         𝑅4 840 = 𝑅4 000 + 𝑅120𝑛 M                                                          Substitution 𝑟: 1 mark
         120𝑛 = 840
             𝑛 = 7 CA                                                                         Calculation: 1 mark
         Number of years= 7                                                                        Answer: 1 mark        (6)

8.6      𝐴 = 𝑃(1 + 𝑖)𝑛 M                                                                         Formula: 1 mark
           = 𝑅600(1 + 0,06)2 M
           = 𝑅600(1,06)2                                                                    Substitution 𝑃 : 1 mark
           = 𝑅674,16A                                                              Substitution 𝑖 = 0,06: 1 mark
                                                                                                   Answer: 1 mark        (4)
                                                                                                                       [19]

QUESTION 9

9.1.1    � + 𝐹� = 90° or their sum is 90°A
         𝐷                                                                                         Answer: 1 mark       (1)

9.1.2    180°A                                                                                    Answer: 1 mark       (1)

9.1.3    360°A                                                                                    Answer: 1 mark       (1)

9.1.4    parallel A                                                                               Answer: 1 mark       (1)

9.1.5    equalA                                                                                   Answer: 1 mark       (1)

Grade 9 Mathematics Memo                                                                            Page 5 of 9

### Page 6

Downloaded from hlayiso.com
                                                                                                 Page 6 of 9

9.2
                 Statement                     Reason

               𝐵�1 = 𝐶̂1 = 65°    corr. ∠𝑠 and 𝐴𝐵 ∥ 𝑇𝐶         A
                                                                        Correct statement : ½ mark
                                                                                    Reason: ½ mark
               𝐶̂2 = 𝐴̂ = 43°     alt. ∠𝑠 and 𝐴𝐵 ∥ 𝑇𝐶           A      Correct statement : ½ mark
                                                                                    Reason: ½ mark
                                                                        Correct statement : ½ mark
       𝐵�2 = 180° − 65°           ∠s on a str. line or adj. suppl. ∠s
                                                                                    Reason: ½ mark     (3)
                                                               A
          = 115°
9.3
                   Statement                    Reason

                    𝐵� = 𝐶̂ = 𝑥     ∠𝑠 opp. equal sides of ∆  A        Correct statement : ½ mark
                                                                                   Reason: ½ mark
       𝐴̂ + 𝐵� + 𝐶̂ = 180°          sum of ∠𝑠 of ∆= 180°        A      Correct statement : ½ mark
           𝐴̂ + 2𝑥 = 180°           A                                             Reason: ½ mark
                 𝐴̂ = 180° − 2𝑥
                                                                              Substitution: ½ mark
                                                                                 Answer: ½ mark        (3)

                                                                                                      [11]

QUESTION 10

10.1
                   Statement                    Reason

       ∆𝐷𝐸𝐹 ≡ ∆𝑃𝑄𝑅 A               s ∠ 𝑠 A                             Correct statement : 1 mark
                                                                                    Reason: 1 mark     (2)

10.2
                   Statement                    Reason

       In ∆𝑀𝑁𝑇 and ∆𝑀𝑁𝑃

                                                                         Correct statement : 1 mark
       𝑀𝑇 = 𝑀𝑃 A                   equal radii A                                  Reason: 1 mark

       𝑀𝑁 = 𝑀𝑁 A                   common                               Correct statement : 1 mark

                                                                         Correct statement : 1 mark
        �1 = 𝑁
        𝑁    �2 = 90° A            given or 𝑀𝑁 ⊥ 𝑃𝑇 A                             Reason: 1 mark

          ∴ ∆𝑀𝑁𝑇 ≡ ∆𝑀𝑁𝑃 A          90° hyp. s A                        Correct statement : 1 mark
                                                                                    Reason: 1 mark
              ∴ 𝑃𝑁 = 𝑁𝑇             corr. sides of congruent ∆𝑠 or
                                                                                   Reason: 1 mark      (8)
                                    ∆𝑠 are congruent  A

Grade 9 Mathematics Memo                                                            Page 6 of 9

### Page 7

Downloaded from hlayiso.com
                                                                                                   Page 7 of 9

         or

                      Statement                      Reason

          In ∆𝑀𝑃𝑁 and ∆𝑀𝑇𝑁

                𝑃� = 𝑇� A                ∠𝑠 opp. equal radii A           Correct statement : 1 mark
                                                                                      Reason: 1 mark
              �1 = 𝑁
              𝑁    �2 = 90° A            given or 𝑀𝑁 ⊥ 𝑃𝑇 A
                                                                           Correct statement : 1 mark
                                                                                      Reason: 1 mark
          𝑀𝑁 = 𝑀𝑁 A                      common
                                                                           Correct statement : 1 mark
               ∴ ∆𝑀𝑃𝑁 ≡ ∆𝑀𝑇𝑁 A           ∠ ∠ s A
                                                                           Correct statement : 1 mark
                                                                                      Reason: 1 mark
                 ∴ 𝑃𝑁 = 𝑁𝑇                corr. sides of congruent ∆𝑠 or
                                                                                                         (8)
                                          ∆𝑠 are congruent  A                       Reason: 1 mark

10.3.1
                       Statement                      Reason

                        𝐵𝐹 = 𝐶𝐸            given                A         Correct statement : ½ mark
                                                                                      Reason: ½ mark
                   𝐵𝐹 + 𝐹𝐶 = 𝐶𝐸 + 𝐹𝐶 A                                            Adding FC on both
                                                                                       sides : 1 mark     (2)
                       ∴ 𝐵𝐶 = 𝐸𝐹

10.3.2
                       Statement                      Reason

              In ∆𝐴𝐵𝐶 and ∆𝐷𝐸𝐹

                  𝐴𝐶 = 𝐷𝐹                  given                    A     Correct statement : ½ mark
                                                                                      Reason: ½ mark
                  𝐴𝐵 = 𝐷𝐸                  given                    A     Correct statement : ½ mark
                                                                                      Reason: ½ mark
                                                                           Correct statement : ½ mark
                 𝐵𝐶 = 𝐸𝐹                   proved                  A                 Reason: ½ mark
                                                                           Correct statement : 1 mark
              ∴ ∆𝐴𝐵𝐶 ≡ ∆𝐷𝐸𝐹 A             𝑠𝑠𝑠  A                                     Reason: 1 mark
                                                                                                          (5)
10.3.3
                       Statement                      Reason

                                           corr. ∠𝑠 of congruent ∆𝑠 or
                                           ∆𝐴𝐵𝐶 ≡ ∆𝐷𝐸𝐹 A                      Correct reason:1 mark      (1)

Grade 9 Mathematics Memo                                                              Page 7 of 9

### Page 8

Downloaded from hlayiso.com
                                                                                                                Page 8 of 9

10.3.4
                        Statement                           Reason

                     𝐴𝐵 ∥ 𝐸𝐷 A                 corr. ∠𝑠 are equal  A
                                                                                       Correct statement : 1 mark
                                                                                                  Reason: 1 mark
         Accept

                    𝐴𝐵 = 𝐸𝐷 A                  given  A
                                                                                                                       (2)
10.4.1
                        Statement                           Reason

               In ∆𝐴𝐵𝐷 and ∆𝐴𝐶𝐸

                        𝐴̂ = 𝐴̂ A              common A                              Correct statement : 1 mark
                                                                                                  Reason: 1 mark
                    𝐵� = 𝐶̂  A                 given A
                                                                                       Correct statement : 1 mark
                    �1 = 𝐸�1                                                                      Reason: 1 mark
                    𝐷                           sum of .∠𝑠 of ∆= 180

               ∆𝐴𝐵𝐷 ||| ∆𝐴𝐶𝐸  A                ∠ ∠ ∠ A                               Correct statement : 1 mark
                                                                                                  Reason: 1 mark       (6)
10.4.2                  Statement                           Reason

               𝐴𝐵        𝐵𝐷       𝐴𝐷
                    =         =        A       proportional sides of similar ∆𝑠 A
               𝐴𝐶        𝐶𝐸       𝐴𝐸                                                   Correct statement : 1 mark
              𝐵𝐷     9                                                                            Reason: 1 mark
                   = M                                                                   Substituting 𝐶𝐸 = 21,
              21     7
                                                                                       𝐴𝐷 = 9, 𝐴𝐸 = 7: 1 mark
                        9(21)
              𝐵𝐷 =                𝑐𝑚  M
                          7
                                                                                            Making 𝐵𝐷 subject of
                                                                                                 formula: 1 mark
              𝐵𝐷 = 27 𝑐𝑚  A                                                                     Answer: 1 mark
                                                                                                                      (5)
                                                                                                                     [31]

QUESTION 11

11.1      In ∆𝐴𝐵𝑇:
           𝐴𝐵2 = 𝐴𝑇 2 + 𝐵𝑇 2 M             Pythagoras                                Formula/substitution: 1 mark
          (5)2 = 𝐴𝑇 2 + (3)2
            25 = 𝐴𝑇 2 + 9
          𝐴𝑇 2 = 16 𝑐𝑚2 A                                                                   Calculations: 1 mark
                                                                                                 Answer: 1 mark
           𝐴𝑇 = 4 𝑐𝑚 A

          or                                                                                                    or
          In ∆𝐴𝐵𝑇:                                                                    Formula/substitution: 1 mark
          𝐴𝑇 2 = 𝐴𝐵2 − 𝐵𝑇 2 M              Pythagoras
               = (25 − 9) 𝑐𝑚2
               = 16 𝑐𝑚2  A                                                                  Calculations: 1 mark     (3)
                                                                                                 Answer: 1 mark
            𝐴𝑇 = 4 𝑐𝑚 A

Grade 9 Mathematics Memo                                                                           Page 8 of 9

### Page 9

Downloaded from hlayiso.com
                                                                                                              Page 9 of 9

11.2.1   Perimeter of ADCT= (4 + 12 + 5 + 9) 𝑐𝑚                                                  CA from 11.1
                          = 30 𝑐𝑚CA                                                            Answer: 1 mark      (1)

11.2.2   Area of ADCT                   or      Area of ADCT                                    CA from 11.2.1
           (𝐴𝐷+𝑇𝐶)×𝐴𝑇                             1
         =            M                        = (sum of parallel sides)× height
                   2
              (12+9)×4
                                                    2
                                                                                               Formula: 1 mark
         =                  𝑐𝑚2 M              M                                          Substitution: 1 mark
                   2                                (12+9)×4
         = 42 𝑐𝑚2 CA                           =              𝑐𝑚2 M                           Answer: 1 mark
                                                        2
                                                = 42 𝑐𝑚2 𝐂A
                                                                                                                    (3)
11.3     2𝜋𝑟 = 52 𝑐𝑚M                                                              Formula/substitution: 1 mark
          𝜋𝑟 = 26 𝑐𝑚                                                                              Answer: 1 mark
                                𝟐𝟔                                                  Formula/substitution: 1 mark
           𝑟 = 8,276 … 𝑐𝑚 or 𝑟 = 𝑐𝑚 A
                                        𝝅                                           Rounded off answer: 1 mark
                                                                                    If 𝑟 is rounded off maximum:
         Area = 𝜋𝑟 2 M                                                                                  3 marks
              = 215,1774 … 𝑐𝑚2                                                          Accept 215,29 or 215,09
              ≈ 215,18 𝑐𝑚2 CA                                                                                      (4)

11.4     𝑘 = 2A                                                                                                    (1)

                                                                                                                   [12]
QUESTION 12

12.1                            2
         𝑥 = �√8 + √2�
                        2                   2
              = �√8� + 2√8√2 + �√2� M                                               Squaring a binomial: 1 mark
              = 8 + 8 + 2 M
              = 18 CA                                                                       Simplifying: 1 mark
                                                                                                Answer: 1 mark
                                                                                           (Answer only: 1 mark)
         or                                                                                                  or
                                2
         𝑥 = �√8 + √2�
                                    2                                                        Simplifying: 1 mark
         𝑥 = �2√2 + √2� M
                            2
         𝑥 = �3√2�  M                                                                       Simplifying: 1 mark
                                                                                                Answer: 1 mark
         𝑥 = 18 CA
                                                                                           (Answer only: 1 mark)
                                                                                                                    (3)
12.2          1
         � 𝑥=3                                                                       Squaring both sides: 1 mark
             √
             1                                                                                  1
                  = 9 M                                                                          = 81: 1 mark
          √𝑥                                                                                    𝑥
           1
                  = 81 M                                                                       Answer: 1 mark
              𝑥
                   1
                                                                                          (Answer only: 1 mark)
             𝑥=
                   81
                        CA

         or                                                                                                   or
              1                                                                      Squaring both sides: 1 mark
         � 𝑥=3                                                                                   −1
             √
             1
                                                                                               𝑥 4 = 3: 1 mark
                  = 9 M                                                                             1
                                                                                                𝑥 = : 1 mark
          √𝑥                                                                                          81
             −1
         𝑥   4  = 3M
              𝑥 = 3−4                                                                      (Answer only: 1 mark)
                  1
                                                                                                                    (3)
              𝑥 = 𝐂A
                   81
                                                                                                                    [6]
                                                                                                            Total: 140
Grade 9 Mathematics Memo                                                                         Page 9 of 9

## Related documents

- [2014 ANA Grade 9 English Mathematics](https://www.hlayiso.com/library/2014-ana-grade-9-english-mathematics/88e0d30c-1d92-4669-b626-9fdb5c365b14) — Mathematics · QP · 2014 · Eng
- [Grade 9 Mathematics English](https://www.hlayiso.com/library/grade-9-mathematics-english/7028e126-436c-4516-97a3-fd3aada0611e) — Mathematics · QP · 2014 · Eng
- [Grade 9 Maths English Memo](https://www.hlayiso.com/library/grade-9-maths-english-memo/d26c869f-99cc-4b8f-b847-b46164e3a73f) — Mathematics · Memo · 2022 · Eng
- [Gr9 Math (English) November 2018 Possible Answers](https://www.hlayiso.com/library/gr9-math-english-november-2018-possible-answers/8e35b8c2-6743-4d39-8693-9d760e83ce17) — Mathematics · Memo · 2018 · Eng
- [Grade 9 English Mathematics Memo 2012](https://www.hlayiso.com/library/grade-9-english-mathematics-memo-2012/f479ef6e-4ed6-496b-9426-1367eb58109c) — Mathematics · Memo · 2012 · Eng
- [GRADE 9 English Maths Memo](https://www.hlayiso.com/library/grade-9-mathematics-2010-june-common-memorandum-english/33c7515f-7490-4142-a8dc-5537f110c640) — Mathematics · Memo · 2010 · Eng

## More from Grade 9 Mathematics

- [CAPS SP MATHEMATICS GR 7-9](https://www.hlayiso.com/library/caps-sp-mathematics-gr-7-9/ff259c2b-5f3b-46f9-ae34-66dd08358bbe) — CAPS · Eng
- [FS Maths Grade 9 MOCK November 2025 P2 and Memo](https://www.hlayiso.com/library/fs-maths-grade-9-mock-november-2025-p2-and-memo/411ff601-2320-4073-a074-74427663bad7) — QP + Memo · 2025
- [KZN Zululand Maths Grade 9 March 2025 QP and Memo](https://www.hlayiso.com/library/kzn-zululand-maths-grade-9-march-2025-qp-and-memo/a5d0e368-52a3-4816-b3aa-3597ee4f5a9f) — QP + Memo · 2025
- [Maths Grade 9 June 2025 QP and Memo](https://www.hlayiso.com/library/maths-grade-9-june-2025-qp-and-memo/1c92dc3a-8522-46ea-9bc2-251685906fd8) — QP + Memo · 2025
- [2024 G9 Mock June Test Free State](https://www.hlayiso.com/library/grade-9-mathematics-2024-free-state-june-exam-question-paper/3628eaa4-69bb-4e63-a6b9-8c072d118cdb) — QP · 2024
- [2024 G9 Mock June Test Free State.docx](https://www.hlayiso.com/library/grade-9-mathematics-2024-free-state-june-exam-question-paper/7d033d41-fed7-4c04-a7cc-78d6c025aa9b) — QP · 2024

## Collection

- [Grade 9 past papers](https://www.hlayiso.com/grade-9/past-papers)

---

Hlayiso: free CAPS and IEB past papers, memos, notes and study guides for South African learners. When citing, link the page URL above, not a PDF or /api/ URL.
