Geometry

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rajan_agarwal: Junior | Next Rank: 30 Posts; Posts: 20; Joined: Sun Oct 25, 2015 3:23 am

by rajan_agarwal » Mon Dec 07, 2015 3:02 am

Q. Sum of all interior angles of an n sided polygon was given as 900. Find number of sides

Source: Beat The GMAT — Problem Solving | Mon Dec 07, 2015 3:02 am

MartyMurray: Legendary Member; Posts: 2135; Joined: Mon Feb 03, 2014 9:26 am; Location: https://martymurraycoaching.com/; Thanked: 955 times; Followed by:140 members; GMAT Score:800

by MartyMurray » Mon Dec 07, 2015 3:59 am

Sum of interior angles of a polygon with n sides = 180(n - 2)

900 = 180(n - 2)

5 = n - 2 n = 7

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