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a=5cm
Pp-pole podstawy
Pp= 6*a²√3/4= 3a²√3/2
Pp= 3*(5cm)²√3/2= 75√3/2 cm²
V= Pp*H
V= 75√3/2 cm²*18 cm= 675√3cm³
Pc= Pp+Pb
Pb= 6*a*H= 6*18cm*5cm= 540 cm²
Pc= 75√3/2 cm²+540cm²