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h=6√3
h=a√3/2
6√3=a√2 /*2
12√3=a√3 /*√3
36=3a /:3
a=12
Pp=a²√3/4
Pp=12²√3/4
Pp=144√3/4
Pp=36√3
V=1/3 * 36√3 * 8
V=96√3cm³