SOLUTION: The ratio of the interior angle to its exterior angle is 3:1.Find the number of sides?

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Question 774703: The ratio of the interior angle to its exterior angle is 3:1.Find the number of sides?
Answer by solver91311(24713) About Me  (Show Source):
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The sum of the interior angles is

The sum of the exterior angles is

The ratio of the sum of the angles is the same as the ratio of the individual angles, so:



But the ratio is 3:1, so



Solve for

John

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