Since the area of a circle is pi*r2 then if A=1; r=2(pi)-.5 or 2 divided by the square root of pi.
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Calculate the radius, which is simply 1/2 the diameter. Then use the standard formula for the area of a circle. ________________________________________________________________ The circle area = (pi) x diameter / 4 = 3.14 x 25/4 = 19.625 Sq inch
A semicircle is half a circle, so its area is half that of a circle: radius = 1/2 diameter = 22 ÷ 2 = 11 area = 1/2πr2 = 1/2π112 ~= 190 sq in
(1248/pi) ft ^ (1/2) = 19.9 ft
Area of any circle = (pi) x (radius)2Radius = 1/2 of the diameter.With this information, you can now find the area of any circle,including that one, on your own.
A circle with a diameter of 1 yard has an area of 0.0066 ares, approx.