Description : how many diagonals decagon have?
Last Answer : 35
Description : How many sides do 1 decagon 4 quadrilaterals and 3 pentagons have?
Last Answer : They add up to (1*10)+(4*4)+(3*5) = 41 sides altogether
Description : What is the sum of the interior angles of a regular decagon?
Last Answer : 1440 degrees. The sum of the interior angles of any regularpolygon of n sides is equal to 180(n - 2) degrees.