Elementary Geometry for College Students (7th Edition) Clone

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 2 - Section 2.3 - Proving Lines Parallel - Exercises - Page 100: 12

Answer

Lines l, m, and n must be parallel.

Work Step by Step

Given that l$\parallel$m and m$\parallel$n, you can use substitution to prove that l$\parallel$n must also be true. Therefore, all three lines are parallel to each other.
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