Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 9 - Section 9.4 - Polyhedrons and Spheres - Exercises - Page 436: 25a



Work Step by Step

$\frac{2\pi r^2+2\pi r(2r)}{4\pi r^2}$=$\frac{6\pi r^2}{4\pi r^2}$=$\frac{6}{4}$=$\frac{3}{2}$
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