Find to the nearest degree, the size of each angle of a regular haptagon (seven sides)
the total number of degrees of all the interior angles is 180°(n-2)
so for a heptagon (notice the correct spelling) n = 7
Find the sum of all the inside angles, then divide by 7
or
each exterior angle is 360/7°
so each interior angle is 180°- 360/7 °