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Q: What is the diameter of a circle if the area is 81pi?

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The diameter of a circle with an area of 37.68 is 6.92

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

A circle with a diameter has an area of 50.265486543928724876568901 sq. ft.

The area of circle that has diameter of 14 centimeters is: 153.9 cm2

The diameter is 20.

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The radius is 9 inches because area of circle is pi*9 squared = 81pi square inches and the diameter is twice the radius which is 2*9 = 18 inches

pi x (d/2)2 = 81pi/4

14

Area = pi*r*r = 81*pi => r^2 = 81 => r = 9 so d = 2*r = 18 ft.

Using 3.14 as Pi the area of circle is: 254.34

The diameter of a circle with an area of 37.68 is 6.92

diameter=18 ft so radius=9 feet area of cirlce=pi*r^2 so area is 81pi ft^2 =81*3.14 ft^2 =254.34 ft^2

The base of the pool is a circle with a diameter of 18 ft. The radius is 9 ft. The area of the circle is (pi) times (R2) = 81pi = 254.47 square feet (rounded to 2 decimal places))

The area of a circle with the diameter of 3m is 7.069 m2

The area of a circle with diameter of 4.9 is 75.43 units2

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

A circle with a diameter has an area of 50.265486543928724876568901 sq. ft.

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