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- \begin{tikzpicture}
- \tikzstyle{point}=[circle,thick,draw=black,fill=black,inner sep=0pt,minimum width=4pt,minimum height=4pt]
- \node (z)[point] at (0,0) {};
- \node (a)[point] at (90:1cm) {};
- \node (b)[point] at (210:1cm) {};
- \node (c)[point] at (330:1cm) {};
- \path (z.center) edge (a.center);
- \path (z.center) edge (b.center);
- \path (z.center) edge (c.center);
- \draw (a.center) -- (b.center) -- (c.center) -- cycle;
- \draw[pattern=north west lines] (a.center) -- (b.center) -- (z.center) --cycle;
- \draw[pattern=dots] (b.center) -- (c.center) -- (z.center) --cycle;
- \draw[pattern=crosshatch] (a.center) -- (c.center) -- (z.center) --cycle;
- \end{tikzpicture}
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