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Keshav Sinha from St. Mary Sr. Sec. School Mayur Vihar Phase-3 , Delhi

Subject :IMO Class : Class 8

The sum of the interior angles of a polygon is 1440°. Find the number of sides of the polygon.

A14
B12
C10
D5

correct answer is 6: 1440-360=1080180n=1080, n=1080/180, n=6

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