The area of an annulus is equal to a quarter of the area of the inner circle.  Solve for the diameter of the outer circle if the inner circle has a radius of  8 cm

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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The area of an annulus is equal to a quarter of the area of the inner circle
Solve for the diameter of the outer circle if the inner circle has a radius of 
8 cm 

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