Geometry Help Please? Test on Monday:(?

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sweetgrl995

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I have a Geometry Test on Monday(I take summer sessions) and I don't even remember the postulates and theorems. I especially don't know how to do this problem:

If the measure of each interior angle of a regular polygon is 108, then the polygon is a(n) _______________?

I don't know how to do this, hope that you can help! Thanks a bunchies(:
 
each interior angle of a regular polygon = (n-2)*180/n
108 = (n-2)*180/n
108n = 180n -360
72n = 360
n = 5 Pentagon
 
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