Answer
6 lines
Work Step by Step
Only 6 unique lines can be formed with 4 points in which none are collinear.
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 1 - Section 1.3 - Early Definitions and Postulates - Exercises - Page 30: 35
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