$ \text{Gegeben:}\\\text{Höhe} \qquad h \qquad [m] \\ \\ \text{Gesucht:} \\\text{Seite} \qquad a \qquad [m] \\ \\ a = \frac{h\cdot 2}{\sqrt{3}}\\ \textbf{Gegeben:} \\ h=1\frac{1}{5}m \qquad \\ \\ \textbf{Rechnung:} \\ a = \frac{h\cdot 2}{\sqrt{3}} \\ h=1\frac{1}{5}m\\ a = \frac{1\frac{1}{5}m\cdot 2}{\sqrt{3}}\\\\a=1,39m \\\\\\ \small \begin{array}{|l|} \hline h=\\ \hline 1\frac{1}{5} m \\ \hline 12 dm \\ \hline 120 cm \\ \hline 1,2\cdot 10^{3} mm \\ \hline 1,2\cdot 10^{6} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline a=\\ \hline 1,39 m \\ \hline 13,9 dm \\ \hline 139 cm \\ \hline 1,39\cdot 10^{3} mm \\ \hline 1,39\cdot 10^{6} \mu m \\ \hline \end{array}$