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Square the diameter and multiply by .7854 (1/4 of pi).

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Q: If you have the diameter how do you get the area?
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How do I figure the area of a circle by diameter?

To find area of a circle using diameter, you use this formuler. Area=pi(diameter/2)(diameter/2)


What is the area of a circle with a diameter of 9.4 m?

The area of a circle with a diameter of 9.4 m is: 69.4 m2


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Does the area of a circle double if its diameter doubles?

The area is four times as large if the diameter doubles.The area of a circle is A = (pi)r2 or (pi)(diameter/2)2Since d is squared, it increases the area by the square of 2 if the diameter is doubled.Try calculating the area for a diameter of 2m, 4m and 8m to prove this.


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To convert diameter to area , you will need to divide the diameter by two so as to get the radius. The result you get, square it and them multiply it by 3.14 to find the area.


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