Skip to content

Right-angled Triangles

This section solves a right-angled triangle in a 2D context with **sin⁡\sin,cos⁡\cosandtan⁡\tan: SOH CAH TOA. From the two knowns and the unknown you choose the ratio, then find a side or an acute angle. Degrees…

Sign up free to read this section

Create a free Hlayiso account to read the full Trigonometry: Sine, Cosine and Area Rules notes for Grade 12 Mathematics.

Sign up free

Common questions

Can’t find your answer? Contact us

What will I learn in "Right-angled Triangles"?

This section covers Right-angled Triangles as part of Trigonometry: Sine, Cosine and Area Rules in Grade 12 Mathematics. You'll find clear explanations, worked examples, and key definitions aligned to the CAPS curriculum.

Is this section aligned with the CAPS curriculum?

Yes. All notes on Hlayiso, including "Right-angled Triangles", are written against the official CAPS curriculum and ATP for Grade 12 Mathematics.

What should I study after "Right-angled Triangles"?

Continue with the next section in Trigonometry: Sine, Cosine and Area Rules, or test your understanding with the interactive quiz linked to this section.

Practise Right-angled Triangles with quizzes and flashcards

Create a free account to practise Grade 12 Mathematics and track your progress.

Start free
Download on the App StoreGet it on Google Play
Free plan available. Paid plans from R49 a month.