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d=12√2
a-bok podstawy
d=a√2
12√2=a√2
a=12
H=⅓a
H=⅓*12
H=4
V=PpH
V=a²H
V=12²*4
V=144*4
V=576
Pc=2Pp+Pb
Pb=4aH
Pb=4*12*4=192
Pc=2*144+192=288+192=480