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6a² = 486
a² = 81
a = 9 cm
V = a³
V = 9³
V = 729 cm³
486/6=81
√81=9
długośc boku wynosi 9cm
V sześcianu=a³
V=9³=729cm³
a - krawędź sześcianu
Pc = 486cm2
6a2 = 486cm2 : 6
a2 = 81cm2
a = 9cm
V = a3
V = (9cm)3
V = 729cm3