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 - 3-3 Proving Lines Parallel - Practice and Problem-Solving Exercises: 47

Answer

A) x=21

Work Step by Step

\begin{array} {ll} \\x+21=2x & \text{Corresponding Angle Theorem} \\21=x & \text{Subtraction Propery of Equality} \end{array}
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