SOLUTION: Find the number of sides of a regular polygon if one interior angle is 120 degrees. 6 5 4 3

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Question 865604:
Find the number of sides of a regular polygon if one interior angle is 120 degrees.
6
5
4
3
Answer by htmentor(1343) About Me  (Show Source):
You can put this solution on YOUR website!
The sum of the interior angles of a regular polygon is S = 180(n-2), where n = the number of sides
If one of the angles is 120, then the sum of all the angles is 120n
120n = 180n - 360
60n = 360
n = 6