Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 8 - Geometry - 8.8 Pythagorean Theorem - 8.8 Exercises - Page 591: 4

Answer

9

Work Step by Step

$\sqrt 81=9$, because $9^{2}=9\times9=81$
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