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nirvana33 [79]
3 years ago
7

How is the formula for finding the sum of interior angle measures of polygons dervived

Mathematics
1 answer:
SSSSS [86.1K]3 years ago
8 0

Step-by-step explanation:

Draw lines from one vertex to the other vertices, splitting the polygon into triangles.  If the polygon has n sides, there will be n−2 triangles.  Each triangle's angles add up to 180°.  So the sum of all the interior angles is:

S = (n−2) 180°

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