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**Part C**

The answer is zero. But I am not sure what I am missing. I am using a Pentagon to do the analysis (I don't feel like drawing a 13-sided object).

It seems like I need to know a little more about the geometry of a Pentagon. How is the center of an odd-number-of-sides polygon defined?

I am assuming that in is not equidistant from ALL of the vertices? Otherwise i don't see how it could be zero.

Am I making this more difficult than it is? Am I just supposed to look up the formula(s) for the center of a 13-sided polygon?