Odpowiedź:
[tex]a) V=\frac{1}{3} *Pp*H\\Pp=\frac{a^{2}\sqrt{3} }{4} =\frac{36\sqrt{3} }{4} =9\sqrt{3} cm^{2} \\V=\frac{1}{3} *9\sqrt{3} *8=24\sqrt{3} cm^{3}[/tex]
[tex]b) V=\frac{1}{3} *Pp*H\\Pp=a^{2} =4,5^{2} =20,25cm^{2} \\V=\frac{1}{3} *20,25*9=20,25*3=60,75cm^{3}[/tex]
[tex]c) V=\frac{1}{3} *Pp*H\\Pp=6*\frac{a^{2}\sqrt{3} }{4} =6*\frac{16\sqrt{3} }{4} =24\sqrt{3} cm^{2} \\V=\frac{1}{3} *24\sqrt{3}*18=8\sqrt{3} *18=144\sqrt{3} cm^{3}[/tex]
