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Year 9

Pythagoras and trigonometry

Choose a subtopic, explore its examples and practise with feedback.

Choose a subtopic.

Explore pythagoras and trigonometry for Year 9. Each subtopic has sample questions and worked answers; choose the skill you want to practise.

01

Find a missing side

Find a missing side

Examples, answers and practice
02

Sine, cosine and tangent

Sine, cosine and tangent

Examples, answers and practice
03

Reverse ratios and multi-step lengths

Reverse ratios and multi-step lengths

Examples, answers and practice
04

Finding angles with inverse trigonometry

Finding angles with inverse trigonometry

Examples, answers and practice

Make, test and investigate.

Investigate constant trig ratios

Build similar right triangles at different scales. Compare opposite/hypotenuse, adjacent/hypotenuse and opposite/adjacent at the marked angle, and explain why the ratios stay equal.

Guided activity · No grade

Keep exploring.

Year 9 · Solving a quadratic by factorising →Year 9 · Finding a missing side with Pythagoras →