Posted by Anal-G on Thursday, January 20, 2011 at 5:31am.
The exterior angles of anything have to add up to 360, all the way around.
2x + 3x + 4x + 5x = 360
3.5 * 4 x = 360
x = 25.71
the biggest exterior angle is 5x = 128.6
180 - 128.6 = -51.4
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