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$ A = \frac{g \cdot h}{2} $
$ g = \frac{A\cdot 2}{ h} $
$ h = \frac{A\cdot 2}{ g} $
$ A =\frac{1}{2}\cdot a\cdot b\cdot sin(\gamma) $
$ U = a+b+c $
Geometrie-Dreieck-Allgemeines Dreieck
$A = \frac{g \cdot h}{2}$
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$g = \frac{A\cdot 2}{ h}$
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$h = \frac{A\cdot 2}{ g}$
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$A =\frac{1}{2}\cdot a\cdot b\cdot sin(\gamma)$
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$U = a+b+c$
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Beispiel Nr: 06
$\begin{array}{l}
\text{Gegeben:}\\\text{Länge der Seite} \qquad c \qquad [m] \\
\text{Länge der Seite} \qquad b \qquad [m] \\
\text{Länge der Seite} \qquad a \qquad [m] \\
\\ \text{Gesucht:} \\\text{Umfang} \qquad U \qquad [m] \\
\\ U = a+b+c\\ \textbf{Gegeben:} \\ c=\frac{1}{5}m \qquad b=\frac{2}{5}m \qquad a=\frac{1}{25}m \qquad \\ \\ \textbf{Rechnung:} \\
U = a+b+c \\
c=\frac{1}{5}m\\
b=\frac{2}{5}m\\
a=\frac{1}{25}m\\
U = \frac{1}{25}m+\frac{2}{5}m+\frac{1}{5}m\\\\U=\frac{16}{25}m
\\\\\\ \small \begin{array}{|l|} \hline c=\\ \hline \frac{1}{5} m \\ \hline 2 dm \\ \hline 20 cm \\ \hline 200 mm \\ \hline 2\cdot 10^{5} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline b=\\ \hline \frac{2}{5} m \\ \hline 4 dm \\ \hline 40 cm \\ \hline 400 mm \\ \hline 4\cdot 10^{5} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline a=\\ \hline \frac{1}{25} m \\ \hline \frac{2}{5} dm \\ \hline 4 cm \\ \hline 40 mm \\ \hline 4\cdot 10^{4} \mu m \\ \hline \end{array} \small \begin{array}{|l|} \hline U=\\ \hline \frac{16}{25} m \\ \hline 6\frac{2}{5} dm \\ \hline 64 cm \\ \hline 640 mm \\ \hline 6,4\cdot 10^{5} \mu m \\ \hline \end{array} \end{array}$