Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 8 - Section 8.4 - Circumference and Area of a Circle - Exercises - Page 384: 27


$\approx$ 7 cm

Work Step by Step

Area of circle = 154 $cm^{2}$ The area A of a circle whose radius has length r is given by A = $\pi r^{2}$ 154 =$\pi r^{2}$ $r^{2}$ = $\frac{154}{3.14}$ r = $\sqrt \frac{154}{3.14} $ = 7.001 cm $\approx$ 7 cm
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