skateboarder1019 skateboarder1019
  • 15-03-2018
  • Mathematics
contestada

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

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jdoe0001 jdoe0001
  • 15-03-2018
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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