CPM Homework Banner

Home > GC > Chapter 8 > Lesson 8.1.5 > Problem 8-49


The exterior angle of a regular polygon is .

  1. What is the measure of an interior angle of this polygon? Show how you know.

    The interior and exterior angles are supplementary.

    An exterior angle of 20 degrees.  Adjacent to the exterior angle is labeled interior angle.

  2. How many sides does this polygon have? Show all work.

    The sum of the measures of the exterior angles is .