Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 3 - Section 3.3 - Isosceles Triangles - Exercises - Page 160: 37

Answer

Statements: 2. $\angle$2≅$\angle$3 3. $\angle$1≅$\angle$2 Reasons: 1. Given 4. The sides across from the base angles of an isosceles triangle are congruent.

Work Step by Step

Statement 1 is given and statement 2 is true because of the definition of vertical angles. Statement 3 confirms that ABC is an isosceles triangle therefore statement 4 is proven.
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