Question 578764
for regular polygons, the sum of the exterior angles is 360º


so, if n is the number of sides, one exterior angle is 360º divided by n


interior (inside) angles are supplementary to exterior angles (the pairs add to 180º)


so the value of an interior angle would be ___ 180 - (360 / n)


or ___ 180[(n - 2) / n]