View source for Interior angle

The '''interior angle''' is the [[angle]] between two line segments, having two endpoints connected via a path, facing the path connecting them.

The regular polygons are formed by have all interior angles [[equiangular]] 

This is the complementary concept to [[exterior angle]]

==Properties==

#All the interior angles of an <math>n</math> sided regular polygon, sum to <math>(n-2)180</math> degrees.

##All the interior angles of an <math>n</math> sided regular polygon,are <math>180(1-{2\over n})</math> degrees.

###As the interior angles, of an <math>n</math> sided regular polygon get larger, the ratio of the [[perimeter]] to the [[apothem]] approaches <math>pi</math>