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The are of a circle can be expressed by:
A = (pi) r^2
So in order to find the radius from the are, you just have to solve this equation for "r".
A/(pi) = r^2
(A/(pi))^(1/2) = r
Or in words: The radius is equal to the square root of the quantity: area divided by pi.
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How to find the area of the cylinder step by step?
step 1: if its an open cylinder you have to find the area of both circles by doing radios times radios times pie. (pie equals 3.14). you do this for both circles. step 2:then you find radios the radios of the rectangle
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