## Elementary Geometry for College Students (7th Edition) Clone

Published by Cengage

# Chapter 1 - Section 1.3 - Introduction to Geometric Proof - Exercises - Page 55: 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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