Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 10 - Geometry - Chapter Summary, Review, and Test - Review Exercises - Page 681: 29


perimeter = $30 \text{ cm}$

Work Step by Step

RECALL: (1) The perimeter of a polygon is equal to the sum of all the lengths of its sides. (2) Opposite sides of a rectangle have equal lengths. Using (2) above, the unknown side lengths are 9 cm and 6 cm. Thus, the perimeter of the rectangle is: $=(9+9+6+6) \text{ cm} \\=30 \text{ cm}$
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