[tex]\it Vom\ nota:\\ \\ h\ -\ \^{i}n\breve al\c{\it t}imea,\ \ \ell\ -\ latura\ bazei[/tex]
[tex]\it h<\ell\ de\ 2\ ori\ \Rightarrow \ell\ >\ h\ de\ 2\ ori \Rightarrow \ell = 2h\ \ \ \ \ \ (1)\ \\ \\ \\ \mathcal{V}=\dfrac{\mathcal{A}_b\cdot h}{3} \Rightarrow 36=\dfrac{\ell^2\cdot h}{3} \Rightarrow 36\cdot3=\ell^2\cdot h\ \ \ \ \ \ (2)\\ \\ \\ (1),\ (2) \Rightarrow 36\cdot3=(2h)^2\cdot h \Rightarrow 36\cdot3=4h^2\cdot h \Rightarrow 36\cdot3=4h^3|_{:4} \Rightarrow \\ \\ \\ \Rightarrow 9\cdot3=h^3 \Rightarrow h^3=27 \Rightarrow h=3^3 \Rightarrow h=3\ cm \Rightarrow \ell=6cm[/tex]
