\documentclass[11pt]{article}
\usepackage{geometry}                % See geometry.pdf to learn the layout options. There are lots.
\geometry{letterpaper}                   % ... or a4paper or a5paper or ... 
%\geometry{landscape}                % Activate for for rotated page geometry
%\usepackage[parfill]{parskip}    % Activate to begin paragraphs with an empty line rather than an indent
\usepackage{graphicx}
\usepackage{amssymb,amsmath}
\usepackage{epstopdf}
\usepackage{pgf}
\usepackage{pgfpages}
\usepackage{tikz}
\usetikzlibrary{arrows,backgrounds}
\usepgflibrary{shapes}
\DeclareGraphicsRule{.tif}{png}{.png}{`convert #1 `dirname #1`/`basename #1 .tif`.png}
\pagestyle{empty}


\begin{document}

% Triangle Edge Numbering
  \begin{center}
    \begin{tikzpicture}
      \node[name=p3, regular polygon,regular polygon sides=3, minimum size=4cm, draw, thick, fill=black!10]{};
      \node[left] at (p3.side 1){2};
      \node[below] at (p3.side 2){0};
      \node[right] at (p3.side 3){1};
      \filldraw(p3.corner 1) circle (2pt);
      \filldraw(p3.corner 2) circle (2pt);
      \filldraw(p3.corner 3) circle (2pt);
    \end{tikzpicture}
  \end{center}

\end{document}  
