Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10:
ISBN 13:

Chapter 8 - Section 8.4 - Circumference and Area of a Circle - Exercises - Page 372: 7b


radius = 1.5 cm diameter = 3 cm

Work Step by Step

The area of the circle = 2.25$\pi cm^{2}$ The area A of a circle whose radius has length r is given by A = $\pi r^{2}$ 2.25$\pi$ = $\pi r^{2}$ 2.25 = $r^{2}$ r = 1.5 cm Therefore diameter of the circle = 2r = 2* 1.5 = 3 cm
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