3.39 Similarity for Area and Volume GCSE Higher PowerPoint Lesson

In this 28-slide lesson, pupils will extend their understanding of similarity by exploring how linear scale factors affect area and volume. They will learn to:

• Calculate the area and volume scale factors from a given linear scale factor

• Apply these to solve problems involving similar 2D and 3D shapes

• Work backwards to find missing lengths using area or volume ratios

This topic strengthens proportional reasoning and prepares pupils for problem-solving in both geometry and real-world contexts.

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

• Two structured tasks to practise key skills

• Challenge activity to extend and deepen learning

Perfect for engaging learners while reinforcing essential geometry concepts.