Definition : A closed figure formed by three or more than side is called polygon.

Important facts about polygon:

1 sum of all interior angle of ‘n’ sided polygon

For example –


2 If all side of a polygon are equal ,then it is called regular polygon.


Type of polygon:

1 Convex Polygon: If all interior angles of a polygon are less than 180°, then it is called convex polygon.

2 Concave polygon: If any of interior angles in a polygon is greater than 180°, then it is called concave polygon.