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OpenStudy (rock_mit182):
Prove that for every positive integer n>=3 , the sum of the interior angles of an n-sided polygon is given by the expression (n - 2)* 180°.
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OpenStudy (rock_mit182):
@sourwing @Loser66 @kropot72
OpenStudy (rock_mit182):
I don't have a clue ... please help me out!
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