If you mean a regular pentagon then each of its 5 interior angles measures 108 degrees
Interior angles of a regular 18 gon (octdecagon) are 160o.
Only when it is a regular polygon that all interior angles are of equal measure
900
9
1350
It is: 135 degrees
108 degrees
No.
540 degrees
Only if the polygon is "regular".
this depends on what type of polygon it is.. if it is a regular triangle, then all interior angles measure up to 180 degrees. So, a triangles interior angles would measure 60 degrees each.
180 degree( 5-2) is the sum of the interior angles. Now divide this by 5 since it is regular and that tells us all the angles have the same measure.