Lösung Flächenberechnung Dreieck

\[\overrightarrow{AB} = \overrightarrow{OB}-\overrightarrow{OA} = \left(\begin{array}{c} 0-2 \\ 9-(-1) \\ -3-4\end{array}\right) = \left(\begin{array}{c} -2 \\ 10 \\ -7\end{array}\right){{\formula}} \\ {{formula}}\overrightarrow{AB} = \overrightarrow{OB}-\overrightarrow{OA} = \left(\begin{array}{c} 0-2 \\ 9-(-1) \\ -3-4\end{array}\right) = \left(\begin{array}{c} -2 \\ 10 \\ -7\end{array}\right) {{\formula}}\]