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SecantFuture
#110942443Saturday, August 24, 2013 8:18 PM GMT

math.tau = math.pi * 2
Notunknown99
#110942818Saturday, August 24, 2013 8:22 PM GMT

3/4 * math.tau / 2 * r ^ 3 or 3/4 * math.pi * r ^ 3?
noliCAIKS
#110944381Saturday, August 24, 2013 8:38 PM GMT

How about 3/8 * math.tau * r ^ 3?
Notunknown99
#110950963Saturday, August 24, 2013 9:44 PM GMT

75% of pi multiplied by the radius cubed.

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