Elementary Geometry for College Students (7th Edition) Clone

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 383: 2

Answer

C = 10$\pi$ in A = 25$\pi in^{2}$

Work Step by Step

Given the diameter of the circle = 10 in So radius = $\frac{d}{2}$ = 5 in The circumference of the circle is given by the formula c= $\pi$ d = 2$\pi$ r =2$\pi$ * 5 = 10$\pi$ in The area A of a circle whose radius has length r is given by A = $\pi r^{2}$cm = $\pi 5^{2}$ =25$\pi in^{2}$
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