Having a sum of its interior angles equal 3240 degrees, an Icosagon type polygon (a plane figure), has a variety of related polygons.
The sum of any icosagon's interior angles is 3240 degrees. 162 144 126 108 90 72 54 36 18 0 In geometry, a polygon (/pln/) is a plane figure that is described by a finite number of straight line segments connected to form a closed polygonal chain or polygonal circuit. 
