Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 8 - Geometry - 8.6 Circles - 8.6 Exercises: 2

Answer

To use the formula for finding the area of a circle, you need to know the length of the radius. If you are given the diameter of a circle, what should you do to find the radius. Divide by two.

Work Step by Step

Area of a Circle: $A$ = $\pi$$r$$^{2}$ Therefore, to find the area the radius is required. Diameter = 2$r$ Therefore: $r$ = Diameter / 2
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