\documentclass[12pt]{article}
\usepackage{psfig}
\usepackage{fullpage}

\pagestyle{empty}
\begin{document}
\thispagestyle{empty}
\centerline{\psfig{figure=solids12.ps,width=2in} \hfill
            \psfig{figure=solids13.ps,width=2in}}
\vfill
\centerline{\psfig{figure=solids14.ps,width=2in} \hfill
            \psfig{figure=solids15.ps,width=2in}}
\vfill
\centerline{\psfig{figure=solids16.ps,width=2in}}



\end{document}