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: 46



Work Step by Step

When it is raised, the area approximately changes from being two equilateral triangles to being three equilateral triangles. Since all equilateral triangles have the same area, we find: % change = $ \frac{3-2}{2}(100) = 50$%
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