Students learn how to calculate the exterior angles of polygons.

As learning progressing students are challenged to find the number of sides a regular polygon has when given its exterior angle.

**Differentiated Learning Objectives**

- All students should be able to recognise exterior angles of a polygon have a sum of 360°.
- Most students should be able to calculate exterior angles of a polygon.
- Some students should be able to calculate the number of sides a regular polygon has when given an exterior angle.