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d=5√2=a
V=a³√2/12
V=(5√2)³√2/12
V=125*2,83√2/12=353,75√2/12=29,48√2 cm³
a czworoscianu=?
a-szescianu=5
a szescianu=a czworoscianu √2
5=a√2
a=5√2/2
V=√2/12 * (5√2/2)³
V=√2/12 * 500√2/8
V=1000/96
V≈10,4cm³