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OpenStudy (anonymous):
In which polygon is the sum of the measures of the interior angles 2160°? A. Nonagon B. 12-gon C. Decagon D. 14-gon
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OpenStudy (anonymous):
The sum of the interior angles of any polygon of n-sides is: 180(n - 2)
OpenStudy (anonymous):
So it is 180(14-2)
OpenStudy (anonymous):
2160 = 180(n - 2) Divide both sides by 180, you get 12 = n -2 n = 14
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
Welcome.
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