## Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole

# Chapter 2 - Section 2.5 - Convex Polygons - Exercises - Page 105: 15a

5 sides

#### Work Step by Step

I=$\frac{(n-2)\times180}{n}$ n(I-180)=-360 n=$\frac{-360}{(I-180)}$ n=$\frac{-360}{(108-180)}$ n=5

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