Students learn how to calculate the interior angles of polygons.

Learning progresses from finding an interior angle to calculating the sum of all the interior angles for any regular polygon.

**Differentiated Learning Objectives**

- All students should be able to calculate an interior angle of a polygon when given its exterior angle.
- Most students should be able to calculate the sum of the interior angles in a regular polygon.
- Some students should be able to calculate the number of sides of a regular polygon when given an interior angle.