Elementary Geometry for College Students (5th Edition)

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 29: 21b

Answer

lines that intersect but are not perpendicular

Work Step by Step

Draw two lines that intersect but make sure the angle is not 90$^{\circ}$
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