Elementary Geometry for College Students (6th Edition)

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

Chapter 1 - Section 1.5 - Introduction to Geometric Proof - Exercises - Page 43: 30

Answer

1. Given 2. Angle addition Postulate 3. Subtraction property of equality

Work Step by Step

1. Given 2. The sum of the two angles within $\angle$ABC is equal to m$\angle$ABC. 3. Subtract m$\angle$DBC from both sides.
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