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How many sides has a regular polygon whose inte... - JAMB Mathematics 2015 Question

How many sides has a regular polygon whose interior angles are 120°each

A
4
B
5
C
6
D
3
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Correct Option: C

Each exterior angle = 180 − 120=60

Exterior angle =360/n

60 = 360/n

n =360/6

= 6

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