If you mean a decagon then its 10 interior angles add up to 1440 degrees
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The measure of the exterior angle.
a convex polygon has 6 sides . What is the sum of the measure of its interior angles?
Each interior angle measures 108 degrees
The sum of the interior angles of a 16-gon is (16-2)*180 = 2520 degrees. The measure of each interior angle cannot be determined unless the polygon is regular.
The measure of each interior angle of a fifteen sided regular polygon, a pendedecagon, is 156o.