Answer
$C=10\pi\approx 10\times3.14=31.4$ square cm
Work Step by Step
The circumference of a circle can be calculated as:
$C=2r\pi=d\pi$ where r is the radius and d is the diameter.
Here:
$d=10$ cm
$C=10\pi\approx 10\times3.14=31.4$ square cm.
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 5 - Section 5.3 - Multiplying Decimals and Circumference of a Circle - Exercise Set - Page 360: 53
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