Elementary Geometry for College Students (5th Edition)

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

Chapter 3 - Section 3.1 - Congruent Triangles - Exercises - Page 136: 21

Answer

Side AD and side EC are congruent.

Work Step by Step

Considering the congruent pairs marked, the additional pair of parts that must be congruent for us to use the SAS method are: side AD of triangle $\triangle$ABD and side EC of triangle $\triangle$CBE.
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