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64cm = 8cm * 8cm
2 * 64cm = 128cm2
4 * 8cm * 8cm = 256cm2
128 + 256 = 384cm2
Objętość
64cm = 8cm * 8cm
8cm * 8cm * 8cm = 512cm3
Pp-pole podstawy
Pb-pole ściany bocznej
Pg=2*Pp+4*Pb
Pp=a*a
64=a*a
64=a²
a=√64
a=8
Pb=a*H
Pb=8*8
Pb=64
Pg=2*64+4*64
Pg=128+256
Pg=684
V=a*a*H
V=8*8*8
V=512