Posted by jodi on Tuesday, April 24, 2012 at 6:57pm.
If the ratio of the interior angle to the exterior angle is 5:1 for a regular polygon, find
a. the size of each exterior angle
b. the number of sides of the polygon
c. the sum of the interior angles
d. Name the polygon

geometry  Steve, Wednesday, April 25, 2012 at 10:25am
interior: (n2)180/n
exterior: 360/n
(n2)180/n ÷ 360/n = (n2)/2 = 5
n = 8
a:
exterior: 45
interior: 135
b: n=8
c: 6(180) = 1080
d: octagon 
geometry  PS  Steve, Wednesday, April 25, 2012 at 10:27am
Oops
n=12
exterior: 30
interior: 150
n=12
10(180) = 1800
dodecagon