How do you find the circumference of a sphere?

Answer 1

If you're measuring it along a "great circle" that would be the same as the circumference of the great circle, that is, 2 pi r.
http://en.wikipedia.org/wiki/Great_circle
If you're measuring it along a "small circle" that would depend on the radius measured from that point on the surface, to the axis. that's why a trip around the world close to the North or South pole is a lot shorter than a trip around the world close to the equator.
If you're measuring a large sphere, such as the earth, you'd want to use pi to more decimal places since the proportionate error would be a lot more than, say, measuring a baseball or a marble.

Answer 2

To find the circumference of a sphere, multiply the diameter by 3.14 or 22/7.

Answer 3

A two dimensional circle has a circumference. A three dimensional sphere has surface area. It doesn't make sense to talk about the circumference of a sphere. However, some people use the term informally to refer to the length of a great circle arc.

The surface area of a sphere of radius r is 4πr².
The length of a great circle of a sphere of radius r is 2πr.

Answer 4

circumference can be found only of the equator of the sphere
if r is the radius of the sphere and so of the equator
circumference = 2*pi*r

Answer 5

Circumference is a property of a circle, you may want to talk about the area of a sphere.

If you are looking for a distance, then compute 2*PI*radius^2. Area of a sphere is 4*PI*radius^2

Answer 6

a sphere has no circumference, only an area and a volume

Answer 7

Its largest circumference is 2 pi r

Answer 8

Find the great circle of a sphere. Measure the diametre.
Circumsference = (pi) (diametre of great circle).

You may choose any small circle, and proceed same as above.

Answer 9

Measure a portion of the arc x Pi.

Answer 10

Multiply with Pi.