Answer
$12$ mm
Work Step by Step
We know that for a right triangle the Pythagorean Theorem states:
$leg_1^2+leg_2^2=hypotenuse^2$
$a^2+b^2=c^2$
Thus we have:
$a^2+16^2=20^2$
$a^2+256=400$
$a^2=400-256$
$a^2=144$
$a=\sqrt{144}$
$a=12$ mm
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
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: 23
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