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H=1m
V=12√3m³
12√3=a²√3/2*1
12√3=a√3/√3
a=12m
V=12 √3 m³
V=1/3* Pp * H
12 √3=1/3 * Pp * 1
Pp=12√3 *3
Pp=36√3
Pp=(a²√3)/4
36√3=(a²√3)/4
a=12
odp:krawedz wynosi 12cm