Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 2 - Section 2.1 - The Parallel Postulate and Special Angles - Exercises - Page 75: 23


The answer is below.

Work Step by Step

1. We are told r is parallel to s. 2. If r is parallel to s, any corresponding angles are congruent. 3. Angle 1 and angle 2 are corresponding angles. 4. Angle 1 is 90 degrees. 5. Thus, by the definition of being congruent, angle 2 is 90 degrees.
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