Answer
29.698
Work Step by Step
$21^2 + 21^2 = x^2$
$441 + 441 = x^2$
$x^2 = 882$
$x = 29.698$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 6 - Section 6.4 - Square Roots and the Pythagorean Theorem - Exercise Set - Page 445: 46
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