Sum interior angles polygon (video) | khan academy, We already know that the sum of the interior angles of a triangle add up to 180 degrees. so if the measure of this angle is a, the measure of this angle. Interior angles polygon quiz - sporcle, Can you name the measure of an interior angle of regular polygons?. Icosagon - wikipedia, In geometry, an icosagon or 20-gon is a twenty-sided polygon. the sum of any icosagon's interior angles is 3240 degrees..
Pentagon - wikipedia, . Interior angle theorem: definition & formula - video, This lesson define interior angle , provide explain formula finding sum interior. Angle sums - illuminations, Choose polygon, reshape dragging vertices locations. figure shape, angle measures automatically update.