Find the measures of an exterior angle and an interior angle given the number of sides of each regular polygon

7

13

14



i really dont understand this and i need it done asap. does anyone know the answer?

for a given regular polygon of N sides, the sum T of the interior angles is

T = (N-2)180

Each interior angle is = T/N and each exterior angle is 180 - T/N

1) 7 Sides = 5 x 180 = 900. Divided by 7 = approx. 128.6, so ext = 51.4
2) 13 Sides = 11 x 180 = 1,980. Divided by 13 = approx. 152.3 so ext = 27.7
3) 14 Sides = 12 x 180 = 2,160. Divided by 14 = approx 154.3 so ext = 25.7

Jim