Answer
13 feet
Work Step by Step
$x$, $x-1$, $5$ are dimensions
$a^2+b^2=c^2$
$5^2+(x-1)^2=x^2$
$25 + x^2-2x+1=x^2$
$26-2x+x^2=x^2$
$26-2x=0$
$26=2x$
$26/2=2x/2$
$13=x$
$13-1 = 12$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 6 - Section 6.7 - Quadratic Equations and Problem Solving - Exercise Set - Page 467: 25
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