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McGraw Hill Integrated II, 2012 View details

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Exercise 11 Page 532

The Polygon Interior Angles Sum Theorem says that the sum of the measures of the interior angles of an n -sided convex polygon is (n-2)180.

1440

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The Polygon Interior Angles Sum Theorem states that the sum of interior angle measures of a n-sided convex polygon is ( n-2)180. To find the sum of the measures of the interior angles of a decagon, we have to substitute 10 for n in this expression. ( 10-2)180=1440