# Interior Angles of Polygons

Students learn how to calculate interior angles of polygons.  Learning progresses from finding an interior angle using 180 - exterior angle to calculating the sum of all the interior angles for any regular polygon.  More able students are challenged to find the number of sides a polygon has when given its interior angle.
##### 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.

### Mr Mathematics Blog

#### Setting up simultaneous equations

Connecting simultaneous equations to density, volume, surface area and rearranging formula.

#### Modelling Direct Proportion

How to teach modelling direct proportion.

#### Drawing Histograms with Unequal Class Widths

How to teach plotting and interpreting histograms with unequal class widths.