Posted by cody gilliam on Thursday, March 31, 2011 at 5:37pm.
I assume you mean "the others." A pentagon has 5 sides.
4s + s + 3 = 128
5s + 3 = 128
Subtract 3 from both sides.
5s = 125
Divide both sides by 5.
s = 25
s + 3 = ?
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