SOLUTION: A convex polygon has 9 sides. What is the sum of the measures of the interior angles

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Question 207019: A convex polygon has 9 sides. What is the sum of the measures of the interior angles
Answer by dlam5(15) About Me  (Show Source):
You can put this solution on YOUR website!
e= 360/n
The exterior angles = 360/n.
Then subtract from 180 to get interior angle.
360/9 = 40
180-40 = 140
140= int.
140* 9 = 1260