Answer
Sometimes true.
Work Step by Step
The diagonals are only congruent for specific parallelograms such as rectangles and squares.
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 4 - Review Exercises - Page 217: 11
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