\documentclass{standalone}
\usepackage{tikz}
\begin{document}

\[	
	\begin{tikzpicture}
\draw (0,0) -- (0,2) -- (2,2);
\draw [fill = black] (0,0) circle (0.050);
\draw [fill = black] (0,1) circle (0.050);
\draw [fill = black] (0,2) circle (0.050);
\draw [fill = black] (1,0) circle (0.050);
\draw [fill = black] (1,1) circle (0.050);
\draw [fill = black] (1,2) circle (0.050);
\draw [fill = black] (2,0) circle (0.050);
\draw [fill = black] (2,1) circle (0.050);
\draw [fill = black] (2,2) circle (0.050);
\end{tikzpicture}
\]
\end{document}
