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Mathematics 9 Online
OpenStudy (anonymous):

A polygon has 11 sides. What is the sum of the measure of the interior angles of the polygon? A. 1800° B. 1620° C. 1440° D. 1980°

OpenStudy (anonymous):

B. 1620

OpenStudy (anonymous):

thanks so much :)

OpenStudy (anonymous):

Welcome! (:

OpenStudy (anonymous):

Use the formula n-2(180), where n=11. 9(180) = 1620. :)

OpenStudy (anonymous):

1620 as 180 x (n-2) where n = no. of sides

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