Answer
The diagonal is about 5.6 inches long.
Work Step by Step
D$^2$=4$^2$+4$^2$
D$^2$=32
D=4$\sqrt 2$$\approx$5.6
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 5 - Review Exercises - Page 274: 34
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