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.
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 2 - Section 2.3 - Proving Lines Parallel - Exercises - Page 87: 12
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
