[tex]\displaystyle \\
\text{Folosim urmatoarea formula, valabila doar la triunghi echilateral:} \\ \\
h = \frac{l \sqrt{3} }{2} \\ \\
\text{unde: } \\
h= 12 ~cm = inaltimea \\
l = ? ~cm = latura \\ \\
l = \frac{2h}{ \sqrt{3} } = \frac{2 \times 12 \times \sqrt{3} }{ \sqrt{3} \times \sqrt{3} } = \frac{24\sqrt{3} }{3 } = \boxed{8\sqrt{3} ~cm }[/tex]
