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\documentclass[12pt]{article}
\usepackage{pspicture,pstricks,fancyhdr}
\usepackage[margin=1in]{geometry}
\pagestyle{fancy}
\rhead{\textsf{J. Lee} \\ Fall 2009}
\lhead{NSC Math 381 \\ Class Notes \#1}
\begin{document}
We partition the triangle into four smaller equilateral triangle, where each of the smaller triangles has side length $\frac{1}{2}$, as in this picture:
\begin{center}
\begin{pspicture}(0,0)(10,8.7)
\pstriangle(5,0)(10,8.66025404)
\pstriangle[gangle=180](5,4.33012702)(5,4.33012702)
\uput[0](2.5,0.4){$\frac{1}{2}$}
\uput[0](7.5,0.4){$\frac{1}{2}$}
\end{pspicture}
\end{center}
\end{document}
This seems to be a problem with my setup only, as my colleague ran created a perfectly good pdf using the same steps.
Thanks for any help.