$interior\ angle=((n-2)*180)/(n)\\n-number\ of\ sides\\\\ 172=((n-2)*180)/(n)\ \ \ |*n\\ 172n=180n-360\ \ \ |Subtract\ 180n\\ -8n=-360\ \ \ |Divide\ by\ -8\\ n=45\\\\ Number\ of\ side\ is\ equal\ to\ 45.$

YourMJK answered Mar 30, 2015

by YourMJK

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Work out the number of sides of a regular polygon with the interior angle of 172 degrees.

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