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H = a
12 pierw 3 = 1,5a^2 pierw3 * a
12 = 1,5 a^3
8 = a^3
a = 2
V=12√3
V=Pp*H
V= 6* a²√3/4 *H
V=6*a²√3/4*a
V=7a²√3/4
12√3=7a²√3/4 |*4
48√3=7a²√3
48=7a²