Find The Measures Of The Interior Angles Of The Polygon. The interior angle is an angle formed inside a polygon and it is between two sides of a polygon. A decagon has ten sides.
We can add the measures of all interior angles of the above hexagon and the. So it is hexagon. This can also be found using the sum of the interior angles of a regular polygon which is.
Substitute n 5 in.
All sides are the same length congruent and all interior angles are the same size congruent. A decagon is a 10 sided polygon with 10 interior angles and 10 vertices which is where the sides meet. Being a REGULAR polygon ALL s are congruent. If the polygon is regular - all its interior angles are equal - you can use.