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12-01-2019
Mathematics

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If an interior angle of a regular measures 140º, how many sides does the polygon have?

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Аноним Аноним

12-01-2019

9

Hope this helps :)

Sum of the angles of a polygon is (n-2)*180

Each angle is (n-2)*180/n

140 = (n-2)*180/n

140n = 180n - 360

-40n = -360

n = 9

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