Since area of a circle = πr^2, a circle with r=1 would have an area of π.
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If a circle's area is 3.14 (Pi), its radius is: about 1.
The area of a circle can be calculated using the formula pi*(radius^2). So in this case, the area of the circle will be pi*(1^2), which is equal to pi.
the area of the circle will be 1/4 of its original area
The area of a semicircle is half of the area of a circle. The area of a circle is pi x radius x radius. So the area of a semicircle is 1/2 x pi x radius x radius or (pi x radius x radius) / 2.
The area of a circle if the radius is 9m 254.5m2