SOLUTION: What regular polygon has an interior angle measure to exterior angle measure ratio of 3:1?

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Question 255152: What regular polygon has an interior angle measure to exterior angle measure ratio of 3:1?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
3x+x=180
4x=180
x=45
.
The interior angle=45*3=135
Let n=number of sides.
Int. angle=(180(n-2))/n
(180(n-2))/n=135
180n-360=135n
45n=360
n=8
Octagon.
.
Ed