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d=a√3
d=4√3 cm
a√3=4√3
a=4cm
Pc=6a²
P=6*4²
P=6*16
P=96 cm²
a√3 - przekątna sześcianu
a√3 = 4√3 |:√3
a = 4
Pc = 6a²
Pc = 6*4*4
Pc = 96cm²