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 - Got It? - Page 157: 1

Answer

l$\parallel$m

Work Step by Step

Line b is the transversal that forms angles 6 and 7. The lines intersected by line b are lines l and m, so lines l and m are parallel.
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