An area cannot be 36 inches.
However, assuming that the area was meant to be 36 SQUARE inches, then
pi*r2 = 36 so r = sqrt(36/pi) = 3.39 inches.
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A circle with a radius of 32 inches has an area of 3,216.99 square inches.
The radius is 16.5 inches.
The formula for the area of a circle is pi times the radius squared, so if the radius is 6 inches, that is pi times 36 square inches. Pi is approximately 3.1415, which gives us an area of 113.094 square inches. If that is not exact enough, pi has been worked out to thousands of decimal places, and can be easily looked up on google.
A cylinder with a radius of 2 inches and a height of 6 inches has a surface area equaling 100.53 square inches.
The area of a square whose perimeter is 36 inches is: 81 square inches.