How many sides does a regular polygon have if the measure of one of it's interior angles is 144?

1 answer:

6 0

Each Interior Angle = 180° - (360 / sides)
144 = 180 - (360 / sides)
(360 / sides) = 36
sides = 360 / 36
sides = 10
It is a decagon.
Source:
http://www.1728.org/polygon.htm

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