prove angle sum property of heptagon
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To find the measure of the interiorangles, we know that the sum of all the angles is 900 degrees (from above)... And there are sevenangles... So, the measure of the interior angle of a regular heptagonis about 128.57 degrees
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Assuming that you are talking about convex polygons. The sum of the exterior angles of any convex polygon is always 360 degrees, regardless of number of sides.So the answer is 360 degrees.
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