Answer
D is on the bisector of $\angle$A.
Work Step by Step
If $\overline{AB}$ is congruent to $\overline{AC}$ and $\overline{BD}$ is congruent to $\overline{CD}$ then D is on the bisector of $\angle$A.
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 3 - Section 3.4 - Basic Constructions Justified - Exercises - Page 159: 39
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