Answer
$60~cm$, $225 \ cm^2$
Work Step by Step
The perimeter of the square is the sum of the lengths of the four sides, that is $4b=4\cdot 15=60\ cm.$ The area is the square of the length of a side, that is, $b^2=15^2=225\ cm^2$.
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 12 - Section 12.2 - Quadrilaterals - Exercise - Page 391: 1
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