F.2 Plane Geometry
2008-07-24 5:44 am
Find the number of sides of a regular polygon if each interior angle is one-third of its corresponding interior angle.
回答 (1)
2008-07-24 6:05 am
✔ 最佳答案
Interior angle = 180(n-2)/n.Exterior angle = 360/n.
Therefore, 1/3[180(n-2)/n] = 360/n
180(n-2) = 3 x 360
n-2 = 6
n=8.
So this is an octagon.
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