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Two circles have the same center $C.$ (Circles which have the same center are called concentric.) The larger circle has radius $10$ and the smaller circle has radius $6.$ Determine the area of the ring between these two circles.

 Oct 12, 2020
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= Area of larger circle - area of smaller circle

 

area of circle = pi r^2

 

pi ( 102 )  - pi (62 )   =  pi (10^2 - 6^2 ) = ..........   units2

 Oct 12, 2020

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