Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1 - Introduction to Algebraic Expressions - 1.1 Introduction to Algebra - 1.1 Exercise Set - Page 11: 89


perimeter = $2l+2w$

Work Step by Step

A rectangle is a 4-sided figure where opposite sides are equal in length. The perimeter of a rectangle is the sum of the lengths of the sides. If the length of a rectangle is l, there are 2 sides that have a length of l. If the width of a rectangle is w, there are 2 sides that have a width of w. The sum of the lengths of the 4 sides is then $l+l+w+w$ or $2l+2w$.
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