# Chapter 6 - Polygons and Quadrilaterals - 6-1 The Polygon Angle-Sum Theorems - Practice and Problem-Solving Exercises: 18

72

#### Work Step by Step

We know that the sum of the exterior angles is 360 degrees. Thus, the measure of each exterior angle is equal to $360/n$. We use this to have: $Angle=360/5=72$

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