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h=6cm
Pb1=12√3 cm²
Pb=1/2·a·h
12√3=1/2·a·6
12√3=3a /:3
a=4√3
Pp=a²√3/4=[(4√3)²·√3 ]/4=48√3/4=12√3 cm²
z pitagorasa
(½a)²+H²=h²
(2√3)²+H²=6²
H²=36-12
H=√24=2√6 --->wysokosc ostroslupa
V=1/3Pp·H=1/3·12√3·2√6=8√18=24√2cm²
Pc=Pp+3Pb=12√3+3·12√3=12√3+36√3=48√3 cm²