[tex]krawedz\ podstawy:\ a\ cm\\\\wysokokosc\ osroslupa::\ H=\sqrt{3}*a\ cm \\\\objetosc\ ostroslupa:\ \ V=16\ cm^3\\\\objetosc\ ostroslupa\ to\ :\\\\V=\frac{1}{3}P_{p}*H\\\\pole\ podstawy\ to\ trojkat\ rownoboczny :\\\\P_{p}=\frac{a^2\sqrt{3}}{4} \\\\\frac{1}{3}*\frac{a^2\sqrt{3}}{4}*\sqrt{3}a =16\\\\\frac{1}{3}*\frac{3a^3}{4}=16\\\\\frac{a^3}{4}=16\ \ |*4\\\\a^3=64\\\\a=\sqrt[3]{64}\\\\a=4\ cm[/tex]
[tex]P_{p}=\frac{a^2\sqrt{3}}{4}= \frac{4^2\sqrt{3}}{4}= \frac{16\sqrt{3}}{4}=4\sqrt{3} \ cm^2[/tex]
