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: 14a


x + y = 180

Work Step by Step

Since $\angle$1 and $\angle$2 are supplementary; m$\angle$1 + m$\angle$2 = 180. Substitute in x for $\angle$1 and y in for $\angle$2. x + y = 180.
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