# Mathematics Grade 12 P2 Gauteng Prelim 2024 Memo (Afrikaans)

> Grade 12 Mathematics Paper 2 memorandum from the Gauteng Prelim Exam 2024 (Afrikaans), 20 pages. Read online or download the free PDF.

- Page: https://www.hlayiso.com/library/gr-12-mathematics-p2-english-and-afrikaans-2024-possible-answers/62b34748-9b6e-41cd-9210-ea13ad628fe1
- Updated: 2026-09-27
- Subject: Mathematics
- Grade: Grade 12
- Language: Afrikaans
- Document type: Memorandum
- Year: 2024
- Exam period: Gauteng Prelim Exam
- Paper: 2
- Curriculum: CAPS
- Pages: 20

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## About this document

Mathematics · Grade 12 · Gauteng Prelim Exam · 2024 · Afrikaans. Memorandum, 20 pages. Read online or download the PDF.

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          PREPARATORY EXAMINATION
           VOORBEREIDENDE EKSAMEN
                              2024
                    OFFICIAL/ AMPTELIKE
                           MARKING
            GUIDELINES/NASIENRIGLYNE

       MATHEMATICS/WISKUNDE (PAPER/VRAESTEL 2) (10612)

20 pages/bladsye

                                1

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NOTE:
  • If a candidate answers a question TWICE, only mark the FIRST attempt.
  • If a candidate has crossed out an attempted question and not redone the question, mark the
    crossed-out version.
  • Consistent accuracy applies in ALL aspects of the marking guidelines. Stop marking at the
    second calculation error.
  • Assuming answers/values to solve a problem is NOT acceptable.
  • Question 7.3 will be the only question in this marking guideline to have a rounding off
    penalty.

LET WEL:
  • As ŉ kandidaat ŉ vraag TWEE KEER beantwoord, sien slegs die EERSTE poging na.
  • As ŉ kandidaat ŉ antwoord tot ŉ vraag doodtrek en nie oordoen nie, sien die doodgetrekte
     poging na.
  • Volgehoue akkuraatheid word in ALLE aspekte van die nasienriglyne toegepas. Hou op nasien
     by die tweede berekeningsfout.
  • Aannames van antwoorde/waardes om ŉ probleem op te los, word NIE toegelaat nie.
  • Vraag 7.3 is die enigste vraag in die nasienriglyne waar afronding gepenaliseer sal word.

                                     GEOMETRY/MEETKUNDE
               A mark for a correct statement
               (A statement mark is independent of a reason.)
        S
               ŉ Punt vir ŉ korrekte bewering
               (ŉ Punt vir ŉ bewering is onafhanklik van die rede.)
               A mark for a correct reason
               (A reason mark may only be awarded if the statement is correct.)
        R
               ŉ Punt vir ŉ korrekte rede
               (ŉ Punt word slegs vir die rede toegeken as die bewering korrek is.)
               Award a mark if the statement AND reason are both correct.
       S/R
               Ken ŉ punt toe as die bewering EN rede beide korrek is.

                                                  2

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QUESTION/VRAAG 1
                                                  Monthly salary (in thousand Rand)      Number of employees
                                                 Maandelikse salaris (in duisend Rand)    Aantal werknemers
                                                           R0  x  R10                            3
                                                           R10  x  R20                           4
                                                           R20  x  R30                          13
                                                           R30  x  R40                          20
                                                           R40  x  R50                          21
                                                           R50  x  R60                          12
                                                           R60  x  R70                          12
                                                           R70  x  R80                           8
                                                           R80  x  R90                           5
                                                          R90  x  R100                           2
 1.1

   Cumulative Frequency/Kumulatiewe Frekwensie
                                                                    Ogive/Ogief

                                                                                                           ✓ (0 ; 0)
                                                                                                           ✓ Upper limit/Boonste limiet
                                                                                                           ✓ Cumulative frequency/
                                                                                                             Kumulatiewe frekwensie
                                                                                                           ✓ Shape/Vorm

  Monthly salaries in thousand Rand/Maandelikse salaris in duisend Rand                                                              (4)

 1.2                                             30 employees/werknemers                                   ✓ answer/antwoord
                                                                                                             Accept/aanvaar 29-31
                                                                                                                                    (1)
 1.3                                             Median/Mediaan = R45 000                                  ✓ answer/antwoord
                                                                                                             Accept/aanvaar
                                                                                                             R44 000 – R46 000
                                                                                                                                    (1)
 1.4.1 Mean/Gemiddeld = R85 857,14                                                                         ✓ answer/antwoord
                                                                                                                                    (1)
 1.4.2 Standard deviation/Standaardafwyking = R2 294,63                                                    ✓ answer/antwoord
                                                                                                                                    (1)
 1.4.3                                           (83 562,51 ; 88 151,77 )                                  ✓ interval
                                                 4                                                         ✓4
                                                     100                                                  ✓ answer/antwoord
                                                 7
                                                                                                                                     (3)
                                                 = 57,14%
                                                                                                                                    [11]

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QUESTION/VRAAG 2

                                        Stall                  Number of             Amount of money
                                      Stalletjie               customers/               spent (R)/
                                                              Aantal klante          Bedrag spandeer
                                                                                           (R)
                                              1                        10                   163
                                              2                         7                   138
                                              3                         9                   185
                                              4                        12                   220
                                              5                         8                   147
                                              6                        13                   245

                                                  SCATTER PLOT/SPREIDIAGRAM
                                    270

                Amount/Bedrag (R)
                                    250
                                    230
                                    210
                                    190
                                    170
                                    150
                                    130
                                    110
                                          5        6      7        8        9   10      11    12       13   14
                                                         Number of customers/Aantal klante

2.1   a = 12,59627329                                  ANSWER ONLY: full marks                ✓a
      b = 17,32919255                                  SLEGS ANTWOORD: volpunte               ✓b
                                                                                              ✓ equation/vergelyking
      yˆ = 12, 60 + 17,33 x
                                                                                                                           (3)

2.2   yˆ = 12, 60 + 17,33(11)                                                                 ✓ substitution/substitusie
                                                       ANSWER ONLY: full marks                ✓ R203,23
      yˆ = 203, 23                                     SLEGS ANTWOORD: volpunte                                            (2)
      OR/OF
      yˆ = 203, 22 (with calculator/met sakrekenaar)                                          ✓✓answer/antwoord

2.3   r = 0,949501084
                                                                                              ✓ value of 𝑟/waarde van r
      r = 0,95
                                                                                                                           (1)

2.4   No/Nee                                                                                  ✓ no, strong positive
      The correlation shows a positive strong correlation between                               correlation/nee sterk
      the money spent and the number of customers./Daar is ‘n                                   positiewe korrelasie
      sterk positiewe korrelasie tussen die geld spandeer en die                                NO marks for NO only/
      aantal klante.                                                                            Geen punte vir slegs NEE
                                                                                                nie                     (1)

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2.5   The gradient will decrease as the line will become less steep.    ✓ decrease/afneem
      The point is far away from the line. Or the point is above the    ✓ point is above the data/far
      data./Die gradiënt sal afneem want die lyn word minder steil.       away from the line/punt is
      Die punt is ver van die lyn af. Of die punt lê bokant die data.     bokant die lyn/punt is ver
                                                                          weg van die lyn af
                                                                                                        (2)
                                                                                                        [9]

QUESTION/VRAAG 3

                                              𝑦

                                                                 𝜃                        𝑥
                                                  O          M

                                       R

3.1    2 y − 3x + 9 = 0                                                        ✓y=0
      2(0) − 3 x = −9                                                           x=3
               x=3
       M(3; 0)
                                                                                                          (2)

3.2           12 − 0                                                            correct substitution of P
       mPM =
              −9 − 3                                                             and M into gradient
               = −1                                                              formula/korrekte
       Substitute/Vervang P (−9;12)                                              substitusie van P en M
                                                                                 in die gradiënt formule
       y − 12 = − ( x + 9 )
                                                                               ✓ mPM = −1
       y = − x − 9 + 12
                                                                               ✓sub of point P or M/
       y = −x + 3                                                               vervang punt P of M

                                                                               ✓equation/vergelyking
                                                                                                    (4)

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3.3          3                                                            ✓ tan  = 3
      tan  =                                                                         2
             2
                                                                          ✓answer/antwoord
       = 56,31
                                                                                                  (2)

3.4   Substitute/vervang (a ; b) into/in y = − x + 3 :
       b = −a + 3                                                         substitution/substitusie
      b = 3 − a                                                                                  (1)

3.5   (5 5 ) = (a − 9) + (b − 9)
            2           2            2                                     substitution into correct
                                                                          formula/substitusie in die
      Substitute/vervang b = 3 − a :                                      korrekte formule
      125 = (a − 9) 2 + (3 − a − 9) 2
      125 = a 2 − 18a + 81 + (−a − 6) 2                                  ✓subs of 𝑎/vervang a

      125 = a 2 − 18a + 81 + a 2 + 12a + 36
      125 = 2a 2 − 6a + 117
       0 = 2a 2 − 6a − 8
       0 = a 2 − 3a − 4                                                   standard form/
                                                                            standaardvorm
       0 = (a − 4)(a + 1)
       a = 4 or a = −1
      Since N is in the second quadrant, we choose a = −1 .
      Omdat N in die tweede kwadrant is, kies a = −1 .                    ✓ correct value of a/
       b = 3 − (−1)                                                        korrekte waarde van a
      b = 4

                                                                          ✓ correct value of b/
                                                                            korrekte waarde van b
                                                                                                (5)
3.6        9+x    9+ y
      3=       0=
            2      2
                                                                          ✓ xR = −3 ✓ yR = −9
      R(−3 ; − 9)
      (−3)2 + (−9)2 = r 2                                                 ✓substitution of R/
      x + y = 90
       2    2                                                             vervang R
                                                                          ✓ x + y = 90
                                                                              2   2
                                                                                                 (4)

3.7   Let 𝛽 be the inclination angle of the line/Laat 𝛽 die inklinasiehoek
      wees van die lyn y = mx + 4                                          ✓  = 11, 31
       = 56,31 − 45 or/of / of     = 56,31 + 45                      ✓  = 101,31
       = 11,31          or/of
                             / of     = 101,31                           ✓ m = 0, 20
      m = tan11,31      or/of
                             / of    m = tan101.31                        ✓ m = −5, 0
      m = 0, 20           or/of
                         or  / of    m = −5,00                                                   (4)
      See diagram for Q3.7 on the next page./
      Sien die diagram vir V3.7 op die volgende bladsy.
                                                                                                 [22]

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3.7

                          𝑦

                                            45°

        𝛽                              56,31°
                                                      𝑥
                         O         M

                R

            𝑦

                    𝛽             56,31°          𝑥
                O             M
                        45°

        R

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QUESTION/VRAAG 4                                   𝑦
                                                       F
                                               C

                                           A

                                               𝜃

                                               B                               𝑥
                              𝜃
                                                       O
                       D

4.1   B(−1;1)                                          ✓answer/antwoord            (1)

4.2   BC = 6 − 1 = 5                                   ✓BC = 5
      AB = 20
       ˆ = 90 tan ⊥ rad/rklyn ⊥ rad
      CAB                                              ✓ CÂB = 90
      AC2 = ( 5 ) −    ( 20 )
                  2             2
                                                       ✓ subs in Pythagoras/
      AC = 5                                               vervang in Pythagoras
                                                                                   (3)

4.3
      tan  =
                AC
                   =
                           5
                             =
                               1                       ✓ tan  = 1
                AB                                                   2
                           20 2
                                                                                   (1)

4.4   mDC  mAB = −1
                       1                               ✓ mDC = 1
      mDC = tan  =                                              2
                       2
      mAB = −2                                         ✓ mAB = −2
      Substitute/Vervang B( −1;1)
                                                       ✓substitution of 𝑚 and B/
      y − 1 = −2( x + 1)                                substitusie van m en B
      y = −2 x − 1                                                            (3)

      OR/OF

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      m AB = tan (90 + 26,57)                                       ✓ mAB = tan (90 + 26,57)
      m AB = − 2                                                     ✓ m AB = − 2
      Substitute/ Vervang B(− 1 ; 1)
      y − 1 = − 2(x + 1)                                             ✓substitution of 𝑚 and B/
                                                                      substitusie van m en B
      y = − 2x − 1
                                                                                             (3)
                                                 𝑦 F

                                             A

                     26,67°                       90° + 26,67°   𝑥
              D                                  B O

4.5   (x + 1)2 + (− 2 x − 1 − 1)2 = 20                               ✓substitution into correct
                                                                      formula/substitusie in
      x 2 + 2 x + 1 + 4 x 2 + 8 x + 4 = 20                            die korrekte formule
      5 x 2 + 10 x − 15 = 0
      x 2 + 2x − 3 = 0
      (x + 3)(x − 1) = 0                                             ✓standard form/
      x = − 3 or/of x = 1                                             standaardvorm
      y = − 2(− 3) − 1
                                                                     ✓ x = −3
      y= 5
      A(− 3 ; 5)
                                                                     ✓y =5
      OR/OF

                                                                                             (4)

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      Eq of DC/Verg van DC:                        ✓equation of DC/
             1                                      vergelyking van DC
      y − 6 = ( x + 1)
             2
          1
      y = x + 6,5                                  ✓equate/gelykstel
          2

      1
         x + 6,5 = −2 x − 1
      2                                            ✓ x = −3
      x + 13 = −4 x − 2
      5 x = −15
                                                   ✓y =5
      x = −3
      y = −2(−3) − 1
      y=5
       A(−3 ; 5)
                                                                           (4)

4.6
      Area of/van ΔABC =
                         1
                         2
                              ( )( )
                              20   5 sin 26,57    ✓1
                                                     2
                                                         (
                                                         20      )( )
                                                                5 sin 26,57

                       =5                          ✓ area of / van ΔABC = 5

      Area of/van ΔODF = (13) (14,53) sin 26,57
                         1
                                                   ✓ 13 and/en 14,53
                         2                         ✓ sin 26,57
                       = 42,25
                                                   ✓
      Area of/van ΔABC : Area of ΔODF = 20 : 169   area of / van ΔODF = 42,25
                                                   ✓answer/antwoord
                                                                         (6)
      OR/OF

      Area Δ ABC =
                       1
                          5  20 = 5              ✓ 1  5  20
                       2                             2

      Equation of DC/Vergelyking van DC:
               1
      y − 6 = ( x + 1)
               2
          1                                        ✓ y = 1 x + 13
      y = x + 6,5                                       2          2
          2
                                                   ✓ OF = 13
                                    1    13
      Equation of/verg van DC is y = x +                   2
                                    2     2        ✓OD = 13
            13
      OF =       and/en OD = 13
             2
                       1  13       169           ✓ 1  13 13
      Area of Δ ODF =    13 =                    2       2
                       2 2          4
                                                   ✓answer/antwoord
      Area Δ ABC : Area Δ ODF = 20 :169                                   (6)

                                                                          [18]

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QUESTION/VRAAG 5

5.1     sin 2 (180  + x ) .sin (− x )
                                       −1
          − sin (90 + x ). tan x
                                                         ✓ (− sin x )
                                                                        2

        =
          (− sin x )2 . − sin x − 1
                        sin x                            ✓ − sin x
            − cos x.                                     ✓ − cos x
                        cos x
                                                         ✓ sin x
        = sin 2 x − 1                                        cos x
             (
        = −1 1 − sin x  2
                            )                            ✓ sin x − 1
                                                               2

        = − cos2 x                                       ✓ − cos2 x
                                                         (6)

5.2.1   sin (A + B)
        = cos90 − (A + B)                             ✓ cos 90 − ( A + B ) 
        = cos (90 − A ) − B                           ✓ cos ( 90 − A ) − B
        = cos(90 − A ) cos B + sin(90 − A ) sin B
                                                         ✓expansion/uitbreiding
        = sin A cos B + cos A sin B
                                                                                     (3)

5.2.2   cos 420  cos15 + sin 300  cos105             ✓ cos60
        = cos 60 cos15 + (− sin 60)(− sin 15)        ✓ − sin 60
                                                         ✓ − sin 15
        = cos(60 − 15)                                 ✓ cos(60 −15)
        = cos 45
             2                                                2
        =                                                ✓
            2                                                2
                                                                                     (5)

5.3.1                     1        
        LHS/LK = tan 2 x        − 1
                          tan x    
                              2

                                                         ✓ 1 − tan x
                                                                    2
        = 1 − tan x
                 2

               sin 2 x
        =1−                                                sin 2 x
               cos 2 x                                   ✓
          cos 2 x − sin 2                                  cos2 x
        =                                                  cos2 x − sin 2
              cos 2 x                                    ✓
          cos 2 x                                               cos2 x
        =
          cos 2 x
        = RHS/RK
                                                                                     (3)

5.3.2   x = 90                                          ✓ answer/antwoord
                                                                                  (1)

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5.4                    cos 2 x = cos x
                  2 cos2 x − 1 = cos x                        ✓ cos 2 x = 2 cos x − 1
                                                                                2

         2 cos2 x − cos x − 1 = 0                             ✓standard form
      (2 cos x + 1)(cos x − 1)= 0                              standaardvorm
              1
      cos x = − or / of cos x = 1
              2
      x = 180 − 60 + k 360 ; k   or x = k 360 ; k     ✓both answers for cos x
      x = 120 + k 360 ; k                                  albei antwoorde vir
      or/of                                                   cos x
                                                              ✓x = k 360 ; k  
      x = 180 + 60 + k 360 ; k  
                                                              ✓
      x = 240 + k 360 ; k                                 x =120 and / en x = 240

                                                              ✓ x = + k 360 ; k  

                                                                                             (6)

5.5   sin 3 = sin (2 +  )                                  ✓ sin 3 = sin (2 +  )
             = sin 2 cos + cos 2 sin                      ✓ compound expansion/
                                             (       )
             = (2 sin  cos )cos + 1 − 2 sin 2  sin 
                                                                saamgestelde
                                                                uitbreiding
             = 2 sin  cos  + sin  − 2 sin 
                              2                  3
                                                              ✓ sin 2 = 2 sin  cos
                       (               )
             = 2 sin  1 − sin 2  + sin  − 2 sin 3         ✓ cos 2 = 1 − 2 sin 
                                                                                        2

             = 2 sin  − 2 sin 3  + sin  − 2 sin 3         ✓ cos  = 1 − sin 
                                                                      2             2

             = 3 sin  − 4 sin 3 
                                  3
                1    1
             = 3  − 4 
                2    2
             =1                                               ✓sub/vervang sin  = 1
                                                                                            2
                                                              ✓answer/antwoord
      OR/OF
                                                                                             (7)
               1
      sin  =
               2
       = 30 or            = 150                           ✓  = 30
      sin 3                sin 3                            ✓  = 150 
      = sin 3(30)          = sin 3(150 )
                                                              ✓ sin 3(30)
      = sin 90             = sin 450 
                                                              ✓ sin 3(150)
      =1                    = sin 90
                                                              ✓ sin 450
                            =1                                ✓ sin 450 = sin 90
                                                              ✓ sin 90 = 1
                                                                                             (7)

                                                                                            [31]

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QUESTION/VRAAG 6

6.1

                                               3
                                                                     ✓ shape/vorm
                                                                     ✓ x-intercepts/x-afsnitte
                                               2                     ✓ turning points/draaipunte
                                       𝒇
                                               1
                       𝒈

      -180°      -135°        -90°      -45°        0°        45°   90°       135°        180°

                                               -1

                                               -2

                                                                                                       (3)
                                               -3

6.2    180                                                          ✓ 180
                                                                                                 (1)

6.3    x  0 ; 45                                                ✓ x  0 ; 45
       x  90 ; 135                                              ✓ x  90 ; 135
                                                                                                 (2)

6.4    Maximum value of/Maksimum waarde van                          ✓3
        f (x)− g (x) = 2 − (− 1) = 3                                                             (1)

6.5    𝑦 = 22𝑐𝑜𝑠𝑥+2

       Range of / Waardevers van 2cos x :     −2 y  2
       Range of / Waardevers van 2cos x + 2 : 0  y  4
       Range of / Waardevers van 22cos x + 2   20  y  2 4
                           1  y  16                               ✓✓ 1  y  16
                                                                                             (2)
                                                                                              [9]

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QUESTION/VRAAG 7

7.1           y                             ✓correct ratio/
      sin  =                                korrekte verhouding
             BE
             y
      BE =                                  ✓ BE =     y
           sin                                      sin 
                                                                      (2)

7.2   In  ABE :
        ˆ = 90 +  .                          ˆ = 90 + 
                                            ✓ BAE
      BAE
        AB          BE                      ✓ correct use of sine rule/
             =
      sin 2 sin(90 +  )                    korrekte gebruik van
            BE  sin 2                       sin reël
      AB =
               cos 
                                            ✓ double angle/dubbelhoek
                  y
                       2sin  cos         ✓co-function/ko-funksie
             = sin                         ✓ substitution of BE/
                       cos 
             = 2y                             vervang BE
                                                                    (5)

7.3   In  BAF is:
                      7y                    ✓correct ratio in terms of
                AF                           y/korrekte verhouding in
           ˆ
      cos BAF=     = 4                       terme van y
                AB 2 y
               7                            ✓ cosBÂF = 7
             =
               8                                         8
        ˆ = 28,955..
      BAF
                                            ✓29° / PENALTY for
             = 29                          incorrect rounding off/
                                            Penaliseer vir foutiewe
                                            afronding                (3)
                                                                    [10]
                                       14

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QUESTION/VRAAG 8

8.
                                                                 A
                                                        1
                                                            23

                G                                                     2   B
                                                                     1
                                                             2
                                                        1
                                                             3
                                                             =
                                                        H

                                                        21
                                  D                     =C

8.1.1   B̂2 = 90                     ∠ in semi-circle/∠ in ŉ halwe sirkel          S     R
                                                                                                 (2)

8.1.2   Bˆ 1 + Bˆ 2 + Gˆ = 180       opposite ∠s of cyclic quad/teenoorst ∠e van   R
                                      kvh
        B̂1 = 32                                                                   S           (2)

8.1.3   ˆ =B
        A   ˆ = 32                   ∠s in the same segment/                       ✓S     R
          2  1
                                                                                                 (2)
                                      ∠e in dieselfde segment

8.2     Ĉ1 = Â 3 = 29              ∠s opposite equal sides/∠e teenoor            S/R
                                      gelyke sye

        D̂ = Ĉ1 = 29                ∠s in the same segment/∠e in dieselfde        S/R
                                      segment
         Â 3 = D̂ = 29
        ∴AB is a tangent to the     converse tan chord theorem/
        circle/AB is ‘n raaklyn aan omgekeerde raaklyn koordstelling                R           (3)
        die sirkel
                                                                                                 [9]

                                                   15

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QUESTION/VRAAG 9

9.1

       Construction/Konstruksie:                                        ✓construction/
       Draw diameter KS and join                                         konstruksie
       KR/Trek middellyn KS en trek KR                                  ✓S ✓R
         ˆ = 90
       QSK                               radius ⊥ tangent/raaklyn
        ˆ = 90                                                         ✓S/R
       SRK                               ∠ in semicircle/halwe sirkel   ✓S   ✓R
                  ˆ = TRK
       but/maar TSK    ˆ                 ∠’s in the same segment/
           ˆ = Rˆ                        ∠e in dieselfde segment                         (6)
        QST

                                          16

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9.2

                                            F
                                            1 2

                                                               Q
                                                                               E

                       G 3
                                                      23
                       1 2                        1
                                                   D
                                       2
                                   1
                                       C

                             B

           A
9.2.1   ˆ =x
        E                         centre = 2   at               R
                                 circumference/                                     (1)
                                 midpts∠=2 x omtreks∠

9.2.2   Fˆ1 = Eˆ = x             tan chord theorem/                S/R
                                 rklyn koordstelling
                                                                   S/R
        ˆ = Fˆ = x
        C                        ext. ∠ of cyclic quad/
         1    1
           ˆ
         C = Eˆ                 buite ∠ van kvh
            1                                                      R               (3)
                                 corresponding ∠s are equal/
         GC|| FE                ooreenk ∠e is gelyk

9.2.3   AB AG                    prop. theorem/eweredigheid-       S     R
           =
        BD GF                    stelling; GB || FD
        AG AC
           =                     prop. theorem/eweredigheid-       S
        GF CE
          AB AC                  stelling; GC || FE
            =
          BD CE                                                                     (3)

                                   17

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9.2.4   AB 4                AC 4
            =      and/en        =         ✓substitution/
        BD 5                CE 5
        12 4                AC 4            substitusie
            =      and/en         =
        BD 5                22, 5 5        ✓BD =15
        BD = 15 and/en      AC = 18
        BC = AC − AB                       ✓AC =18
          = 18 − 12
          =6                               ✓BC = 6
        CD = BD − BC
          = 15 − 6
          =9                               ✓CD = 9
                                                             (5)
                                                            [18]

                                      18

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QUESTION/VRAAG 10

10.
                                              C

                                                        K
                                                          1                 H

                          D
                                          G
                                                               1 2
                                                                 E

                      A                   .
                                          F
                                                                     B

10.1   Tangents from the same point                                             R
                                                                                            (1)

10.2   In Δ DCE and Δ HEK is :
          ˆ = Eˆ
       1. C                      alt. ∠s./verw. ∠e ,DC || EH                    S /R
                  2
          ˆ
       2. D = E ˆ                ∠s opp equal sides/∠e teenoor gelyke sye       S
                  1
         ˆ = 180 − Cˆ
        2D                       sum of ∠s in triangle/ binne ∠e van ∆          S
        ˆ =H
        K    ˆ                   ∠s opp radii/ /∠e teenoor gelyke radii         S/R
         1
         ˆ = 180 − Eˆ
        2H                       sum of ∠s in triangle / binne ∠e van ∆         S
                       2
            ˆ   ˆ
        but C = E                proved
                      2

       Dˆ =Hˆ
         CDE|||  EHK          ∠∠∠                                            R
                                                                                            (6)

                                              19

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         ˆ = 90
                         tan

10.3   FGE               tan ⊥radius / rkln⊥radius                    S R
        DG = GE         line from centre ⊥ to chord/ lyn vanuit      R

                         midpt loodreg op koord                                     (3)

10.4   DC DE               Δ CDE|||ΔEHK                               S/R
           =
       HE HK
                                                                      ✓substitute
       DC×HK = DE×HE                                                  DE=2GE
       DC×HK = 2GE×HE
                         radii/radiusse
       but GE = HE
                                                                      ✓S
        DC×HK = 2HE 2
                                                                      (3)

                                                                                [13]
                                                                   TOTAL/TOTAAL: 150

                                     20

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