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17 February, 20:19

Find the sum of the measures of the interior angles of the indicated convex polygon 21-gon

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  1. 17 February, 20:39
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    Sum of all interior angles on a polygon is

    180 (n - 2) n = number of sides in the polygon.

    now, this one is is a 21-gon, thus the sum is 180 (21 - 2).
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