Find the measure of an exterior angle regular pentagon and an exterior angle of a
regular decagon. What is the ratio between these two angles?
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We know that exterior angle of n sides
polygon is given by
n/360
Pentagon =5 sides
Decagon =10 sides
∴ Exterior angle of pentagon =
5/360 =72°
Exterior angle of Decagon =
10/360 =36°
Ratio = 72/36 =2:1
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