Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 1 - Section 1.6 - Relationships: Perpendicular Lines - Exercises - Page 50: 21e

Answer

Vertical

Work Step by Step

Vert. is short for vertical, as in vertical angles.
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