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2010-03-24T22:16:37+01:00
P=4*pi*r2
P=4*pi*6^2=4*pi*36=144pi
11 4 11
2010-03-24T22:17:13+01:00
P=4πr²

P=4π*6²
P=4π*36
P=144π≈452,4 j²
3 4 3
2010-03-24T22:17:19+01:00
Pc = 4πR²

Pc = 4π*6*6
Pc = 144π
Pc ≈ 452,16
5 5 5