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Polygon Interior Angles Sum Theorem
Polygon Interior Angles Sum Theorem
The sum of the measures of the interior angles of a convex polygon with sides is
.
Example :
Find the sum of the measures of the interior angles of an octagon.
Solution:
An octagon has sides. So, .
Substitute for in the formula.
The sum of the measures of the interior angles of an octagon .
The sum of the measures of the interior angles of an octagon is .