Students practice finding the area of a triangle. As the lesson progresses students learn how to use the formula and are challenged to find the area of composite triangles on a grid.

The start of the lesson recaps finding the area of rectangles. In the main part students learn how to calculate the area of triangles using the formula. In the plenary all are challenged to find the area of a composite shape using triangular components.

**Differentiated Learning Objectives**

- All students should be able to calculate the area of a triangle as half the area of a rectangle.
- Most students should be able to calculate the area as a product of half its base and perpendicular height.
- Some students should be able to calculate the area of composite shapes involving triangles