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if each exterior angle of a regular polygon measures 20 degree what is the sum of its interior angle |
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Answer» ➡️So there are 18 exterior angles. This ALSO means that there are 18 vertices and 18 INTERIOR angles. Since each interior/exterior pair is supplementary and since the exterior ANGLE is 20, the interior angle is 180-20 = 160 degrees. for the sum of all the interior angles. |
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