Aadya N.

asked • 02/13/18

Question related to the perimeter and area of a concentric circle

Two concentric circles have the radii 12cm and8.5cm respectively. Find the area of the space enclosed by the two circles.

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Andrew M. answered • 02/13/18

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Since one circle is contained within the other, the area enclosed within the two circles is
merely the area of the larger circle.  This means a radius of 12cm
 
Area = πr2 = 122π = 144π cm2
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Andrew M.

If you need the area of space that is enclosed by BOTH circles then that is the
area of the smaller circle:  A = 82π = 64π
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02/13/18

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