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Pb=18×5×6=540
Pc=2×37,5√3 =75√3+540 cm²
V=Pp× H
V=37,5√3 ×18= 675√3 cm³
a = 5cm
Pc = 2*Pp + +Pb
V = Pp * h
Pp = 6*(5² *√3):4 = 125√3/2
Pc = 2*125√3/2 + 6*18*5 = 125√3 + 540 cm²
V= 125√3/2 *18 = 135√2 cm³