"Andy Hall" wrote in message
...
On Thu, 20 May 2004 12:15:08 GMT, "BigWallop"
wrote:




The radius squared multiplied by pi gives the area of a circle. Two times
Pi
multiplied by the diameter give the circumference.

2 x pi x radius = circumference

That would make more sense - the circumference is Pi x Diameter which is the
same as Pi x Diameter x radius, the Diameter being twice that radius.


Pi multiplied by 4 then multiplied
by the radius squared gives you the surface area of a sphere.

http://mathforum.org/paths/measurement/aos.html



.andy

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