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\documentclass[12pt]{exam}
\usepackage{geometry}
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{multicol}
\usepackage{amsmath}
\usepackage{subfigure}
\usepackage{epstopdf}
\usepackage{pstricks}
\usepackage{pst-coil}
\usepackage{color}
\usepackage{pst-plot}
\usepackage{pst-func}
\usepackage{pstricks-add}
\listfiles
\begin{document}
\begin{pspicture}(0,-3)(5,3)
\SpecialCoor
\pspolygon(0,0)(3;60)(3;60|3,0)
\end{pspicture}