JohnBranks9983 JohnBranks9983

19-10-2017
Mathematics

contestada

If one exterior angle in a regular polygon is 120°, then what kind of polygon is it?

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ejelonubenedict ejelonubenedict

20-10-2017

interior angle = 180-exterior = 180-120= 60°
using
[(n-2)180]÷n = 60
(n-2)180 = 60n
180n -360 = 60n
180n -60n =360
120n = 360
n = 360÷120 = 3
it's a triangle

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