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a=8cm
V=a³
V=8³
V=512 cm³
2.
V=Pp*H/3
H=3V/Pp
H=3V/(a²)
H=3*18/3²
H=3*2
H=6dm
3.
z zalezności boków w trojkacie 45 45 90
H=10cm
r=10cm
l=r√2
l=10√2 cm
4.
P=4πR²
R²=P/(4π)
R²=16π/(4π)
R²=4
R=2
V=4/3 πR³
V=4*2³π/3
V=4*8π/3
V=32π/3 [j³]