Students learn to calculate the interior angles of polygons using clear diagrams, exterior angle facts and the relationship between angles around a point.
The lesson moves from finding a single interior angle to calculating the sum of the interior angles in a polygon and using this to solve problems with regular polygons.
Related Blog : Angles in Polygons
Scheme of Work Link
Angles in Parallel Lines and Polygons
Differentiated Learning Objectives
- All students should be able to calculate an interior angle of a polygon using its exterior angle.
- Most students should be able to calculate the sum of the interior angles in regular and irregular polygons.
- Some students should be able to calculate the number of sides in a regular polygon from a given interior angle.
