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 - 3-8 Slopes of Parallel and Perpendicular Lines - Lesson Check - Page 201: 6


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Work Step by Step

For parallel lines, the slopes are the same. On the other hand, the slope of perpendicular lines are opposite reciprocals. (This means that if the slope of a line is 3, the slope of a perpendicular line is negative 1/3.)
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