Answer
80 cm
Work Step by Step
(.5s)$^2$=13$^2$-12$^2$
(.5s)$^2$=169-144
(.5s)$^2$=25
.5s=5
s=10
P=8s
P=8(10)
P=80
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 7 - Test - Page 339: 14
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