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Pc= 2(ab+bc+ac)
a=2
b=4
c=5
Pc=2(2*4+4*5+2*5)
Pc=76
V=abc
V=2*4*5
V=40
szescian 2)
Pc=6a
a=2
Pc=6*2
Pc=24
V=a
V=2
V=8