any formula with pi in it can be switched around so that pi is on one side of the equation and everything else is on the other side. ex. C = circumference of a circle r = radius of a circle C = 2 * pi * r or C / 2 = pi * r or C / (2r) = pi Therefore: pi = C / (2r)
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its 2 pie r squared BUT you have to add back the base (a circle) which is pie r2 The original formula is 4 pie r squared Your new formula is (2 pie r squared + pie r squared)
It isn't. That is the formula for the AREA of a circle!
[2 x pie x radius] or [pie x diameter]
If the pie is a perfect cylinder then the formula for volume would be: Area= (height)(pi)(radius^2)
'3.14' is an APROXIMATION for 'pi'