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If by ' A 64 pi' you mean the Area. Then

A = 64pi

Since A = pi r^2 and 64 is 8^2

Then we can say r(radius)= 8

The circumference of a circle is

C = 2*pi*r

Hence

C = 2 x 3.14 x 8

C = 16 x 3.14

C = 50.24 linear units.

The value for 'pi' at 3.14 is an approximation.

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The circumference of any circle = diameter*pi or 2*pi*radius

I am not sure what you mean "A". In general, you can calculate the circumference of a circle:* By multiplying the diameter times pi, or

* By multiplying the radius times 2 times pi.

Q: What is circumference if A 64pi?

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Area = 64pi implies that radius = 8 units So diameter = 2*rad = 16 units.

64pi (miles square)

The area of a circle can be found with the formula (pi)r2. Since r = d/2, r would be 8in in this case. A = 64pi in2, or 201.1in2

Circumference = 2pi*r Circumference = 86pi

circumference = 24.5

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Area = 64pi implies that radius = 8 units So diameter = 2*rad = 16 units.

64pi

A = 64pi

64pi (miles square)

Area = 4*pi*42 = 64pi square units

Area of pizza: 64pi square inches.

The new volume is 76.566 cubic inches.

area = pi*r2 2r = d r = 8 inches area = pi*82 area = 64pi

Surface area of the sphere: 4*pi*42 = 201.062 square inches rounded to 3 decimal places

To find the surface area of a sphere, the formula is: 4pi*r2So plug in numbers: 4pi(4)24pi(16)=64pi

A circumference is 4

No. It is circumference/(2*pi)No. It is circumference/(2*pi)No. It is circumference/(2*pi)No. It is circumference/(2*pi)