$A = a^{2}$
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$a = \sqrt{A}$
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$U = 4\cdot a$
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$a = \frac{U}{4}$
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$d = a\cdot \sqrt{2}$
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$a = \frac{d}{\sqrt{2}}$
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Beispiel Nr: 10
$\begin{array}{l} \text{Gegeben:}\\\text{Seite} \qquad a \qquad [m] \\ \\ \text{Gesucht:} \\\text{Fläche} \qquad A \qquad [m^{2}] \\ \\ A = a^{2}\\ \textbf{Gegeben:} \\ a=1\frac{2}{3}m \qquad \\ \\ \textbf{Rechnung:} \\ A = a^{2} \\ a=1\frac{2}{3}m\\ A = (1\frac{2}{3}m)^{2}\\\\A_{q}=2\frac{7}{9}m^{2} \\\\\\ \small \begin{array}{|l|} \hline a=\\ \hline 1\frac{2}{3} m \\ \hline 16\frac{2}{3} dm \\ \hline 166\frac{2}{3} cm \\ \hline 1666\frac{2}{3} mm \\ \hline 1666666\frac{2}{3} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline Aq=\\ \hline 2\frac{7}{9} m^2 \\ \hline 277\frac{7}{9} dm^2 \\ \hline 27777\frac{7}{9} cm^2 \\ \hline 2777777\frac{7}{9} mm^2 \\ \hline \frac{1}{36} a \\ \hline 0,000278 ha \\ \hline \end{array} \end{array}$