3.42 The Sine Rule GCSE Higher PowerPoint Lesson

In this 21-slide lesson, students will learn how to apply the sine rule to find missing sides or angles in non-right-angled triangles. They will explore when the sine rule is appropriate to use, particularly in ASA, AAS, and non-right-angled SSA cases. Through guided examples and practice problems, students will develop accuracy in solving for unknown values and interpreting ambiguous cases when necessary. This lesson reinforces understanding of angle-side relationships and strengthens problem-solving skills involving non-right-angled triangles.

Note this lesson is for the higher tier.

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.