Elementary Geometry for College Students (5th Edition)

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

Chapter 1 - Section 1.2 - Informal Geometry and Measurement - Exercises: 34


$\angle$ ABD is the bisected angle.

Work Step by Step

According to the problem, "An angle is bisected if its two parts have the same measure." Since the m$\angle$ ABC = 10$^{\circ}$ and the m$\angle$ CBD = 10$^{\circ}$, then ray BC is the angle bisector of $\angle$ ABD.
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