$
\text{Gegeben:}\\\text{Hypotenuse} \qquad c \qquad [m] \\
\text{Kathete} \qquad a \qquad \qquad [m] \\
\\ \text{Gesucht:} \\ \text{Kathete} \qquad b \qquad [m] \\
\\ b =\sqrt{c^{2} - a^{2} }\\ \textbf{Gegeben:} \\ c=5m \qquad a=4m \qquad \\ \\ \textbf{Rechnung:} \\
b =\sqrt{c^{2} - a^{2} } \\
c=5m\\
a=4m\\
b =\sqrt{(5m)^{2} - (4m)^{2} }\\\\b=3m
\\\\\\ \small \begin{array}{|l|} \hline c=\\ \hline 5 m \\ \hline 50 dm \\ \hline 500 cm \\ \hline 5\cdot 10^{3} mm \\ \hline 5\cdot 10^{6} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline a=\\ \hline 4 m \\ \hline 40 dm \\ \hline 400 cm \\ \hline 4\cdot 10^{3} mm \\ \hline 4\cdot 10^{6} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline b=\\ \hline 3 m \\ \hline 30 dm \\ \hline 300 cm \\ \hline 3\cdot 10^{3} mm \\ \hline 3\cdot 10^{6} \mu m \\ \hline \end{array}$