Students learn how to find the composite area of 2D shapes involving triangles, rectangles, trapezia and parallelograms. By calculating the area of individual shapes students learn how to combine areas to solve more complex problems.

The start of the lesson reviews the composite area of rectangles. The plenary challenges students to investigate different ways in which to find a composite area involving triangles, trapezia and rectangles.

**Differentiated Learning Objectives**

- All students should be able to solve problems involving the area of a trapezium.
- Most students should be able to solve problems involving the area of composite shapes.
- Some students should be able to calculate unknown lengths in composite shapes when given the area.