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d=a√3
a√3=6
a=6/√3*√3/√3=2√3
P=6*(2√3)²=6*4*3=72 cm²
I.
Odp. C
V=a³=8*3*√3=24√3 cm³
II. odp. B
2.
h²+(a√2)²=(8√2)²
2h²=64*2
h²=64
h=8 cm
a√2=8 cm
V=Pp*h
Pp=1/2*8²=1/2*64=32 (ze wzoru na pole rombu)
V=32*8=256 cm³