Answer
40 cm
Work Step by Step
The apothem of a square is equal to half of the length of a side.
s=2a
s=2(5)
s=10
P=4s
P=4(10)=40
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 7 - Section 7.3 - More about Regular Polygons - Exercises - Page 343: 12
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