College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter R - Section R.3 - Geometry Essentials - R.3 Assess Your Understanding - Page 36: 32

Answer

$A = 4\pi \approx 12.57 \text{ square feet}$ $C=4\pi \approx 12.57 \text{ feet}$

Work Step by Step

RECALL: (1) The area $A$ of a circle can be found using the formula: $A=\pi{r^2}$ where r = radius (2) The circumference $C$ of a circle can be found using the formula: $C=2\pi{r}$ where r = radius The given circle has a radius of 2 feet. Use the formula and the given measurements above to obtain: $A= \pi(2^2) \\A= \pi(4) \\A = 4\pi \approx 12.57 \text{ square feet}$ $C=2\pi{r} \\C=2\pi(2) \\C=4\pi \approx 12.57 \text{ feet}$
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