Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 8 - Section 8.4 - Circumference and Area of a Circle - Exercises - Page 374: 38



Work Step by Step

As the number of sides gets larger, the polygon becomes more like a circle. Thus, we treat it like a circle with radius 7: $A = \pi r^2 \\ A = \pi (7^2) \approx 154$
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