Track / Stage 4 / 13 of 340 #273 of 2000

3. In the Cartesian coordinate system, the area of the triangle with vertices at $(-3,-3)$, $(9,2)$, $(1,7)$ is $\qquad$ .

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Official solution

\begin{tabular}{c}
$\mathbf{3}$ \\
\hline 50 \\
\hline
\end{tabular}

Source: NuminaMath-1.5, licensed Apache-2.0. Statement and solution reproduced as published; topic, difficulty and ordering added by this site.