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a=4cm
h=?
Pc=Pp+Pb
Pp=a²√3/4=4²√3/4=16√3/4=4√3 cm²
10√3=4√3+Pb
10√3-4√3=Pb
Pb=6√3 cm²
Pb=3·1/2·a·h=3/2·4·h=6h
6√3=6h /:6
h=√3 cm---->wysokosc sciany bocznej ostroslupa