Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 3 - Parallel and Perpendicular Lines - 3-2 Properties of Parallel Lines - Practice and Problem-Solving Exercises - Page 154: 22

Answer

A is the incorrect solution, and B is the correct solution.

Work Step by Step

A is the incorrect solution, and B is the correct solution. By the Same side Interior Angles Postulate, the sum of both the angles should be = $180^{\circ}$. This is correctly illustrated in answer B. Answer A considers both angles to be equal, which is wrong.
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