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zatem H=2r=√256=16
r=8
wzór na pole powierzchni bocznej:
Pb=2πr*H=2rH*π=256π [cm²]
P kwadratu = a2
256 cm2 = a2
a = 16 cm
r = 1/2 a = 8
Pb = 2 * Pi * r * h
Pb = 2 * Pi * 8 * 16 = 256 Pi cm 2