WHOLE LESSON; INTERIOR AND EXTERIOR ANGLE OF POLYGON

This is a flexible lesson on the interior angle sum of an n-gon. The starter is a simple multi choice on estimation of angle size which will help warm the class up. The powerpoint contains both classic ways of teaching this subject: the first few slides come at this from the formula exterior angle = 360 divided by the number of sides when the polygon is regular. The latter slides approach it in a more traditional experimental manner of splitting the polygon into n- 2 triangles. How you deliver the lesson is therefore up to you! The spreadsheet contains multiple activities, most of them differentiated and a print out of a table of facts that students can stick in their books. Most of the resources are write on also so there is no need for students to draw a thing. This should be all you need to tackle this topic