Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 1 - Section 1.1 - Sets, Statements, and Reasoning - Exercises - Page 9: 33

Answer

Vertical Angles are equal.

Work Step by Step

Vertical angles are opposite pairs of congruent (or equal) angles that are made when 2 lines intersect (cross at a point M). In the figure, opposite angles 1 and 2 are called vertical angles based on the definition.
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