Finding Exterior Angle Measures

Finding Exterior Angle Measures

Introduction

Have you ever noticed the corners of a stop sign, a soccer field, or a building? Those corners are made by angles. Exterior angles are angles formed outside a polygon when one side is extended. Learning about ex...

Olivia is working on her math homework when she sees a triangle with two interior angles labeled 36 degrees and 72 degrees, and an exterior angle marked with the variable x.

Olivia quickly remembers the key rule: the exterior angle of a triangle equals the sum of the two nonadjacent interior angles.

So, she adds 36 and 72...