Have a play with the slider which corresponds to the number of vertices (corners) on a polygon.[br][br][u]Questions[/u][br][br]What is a polygon?[br]What do we mean by regular?[br]What is the sum of angles for regular polygons? Are they the same or different when n (number of vertices) is changed? Can you explain why?[br]Can you work out the size of each interior angle of a regular polygon?[br]What is the exterior angle of each regular polygon?[br][br]