Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 1 - Section 1.2 - Angles and Their Relationships - Exercises - Page 47: 13


$\angle$ FAC and $\angle$ CAD form a linear pair.

Work Step by Step

Since ray AF and ray AD are opposite angles, they form a line. And since $\angle$ FAC and $\angle$ CAD are adjacent angles they form a linear pair.
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