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12a=36
a=3 cm
P=6a²
V=a³
P=6*3²=6*9=54 cm²
V=3³=27 cm³
sześcian ma 12 krawędzi
36:12=3 cm
P=3cm*3cm*6cm=54cm2
V= 3cm*3cm*3cm =27cm3