Students learn how to calculate the area of compound rectilinear shapes.

Learning progresses onto exploring different ways in which a composite shape can be broken up.

**Differentiated Learning Objectives**

- All students should be able to determine the area of a compound rectilinear shape by counting.
- Most students should be able to determine the area of a compound rectilinear shape by calculating.
- Some students should be able to determine possible perimeters when given the area of a compound rectilinear shape.