i think you do d x pi
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Use the formula for the particular figure
To find area of a circle using diameter, you use this formuler. Area=pi(diameter/2)(diameter/2)
The area of a circle is {pi} x radius2. 12 = 1, so: a circle of radius 1 unit has an area of exactly pi units2
Using 3.14 as Pi the area of circle is: 530.66
area of a circle is equal to pi times the square of its radius.. A=(pi)r^2