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pzazz12: Master | Next Rank: 500 Posts; Posts: 155; Joined: Wed Sep 22, 2010 3:54 am; Thanked: 6 times

by pzazz12 » Tue Oct 05, 2010 2:06 am

If the sum of the interior angles of a regular polygon measures up to 1440 degrees, how many sides does the polygon have?

A. 10 sides
B. 8 sides
C. 12 sides
D. 9 sides
E. None of these

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Source: Beat The GMAT — Problem Solving | Tue Oct 05, 2010 2:06 am

shovan85: Community Manager; Posts: 991; Joined: Thu Sep 23, 2010 6:19 amFollowed by: 24 members; Location: Bangalore, India; Thanked: 146 times

by shovan85 » Tue Oct 05, 2010 2:18 am

IMO A

There is a formula Total inter Angle Sum = (n-2)180 ,where n is the number of sides of a polygon

Plug the values get the answer

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