3.31 Trigonometry Missing Angles GCSE PowerPoint Lesson

In this 26-slide lesson, pupils will use sine, cosine, and tangent to find missing angles in right-angled triangles. The lesson focuses on selecting the correct ratio, substituting known values, and using the inverse trigonometric functions on a calculator. Pupils will practise setting out clear working and rounding answers to appropriate accuracy. Problem-solving tasks will include real-life contexts and multi-step questions to consolidate understanding.

The lesson includes:

• Clear, guided examples

• Discussion opportunities from Think, Pair, Share

• Mini whiteboard section to check understanding and clarify misconceptions

• One structured task to practise key skills

• Challenge activity to extend and deepen learning

Perfect for engaging learners while reinforcing essential geometry concepts.