% Diagram by nilrem for PGDP project: Plane Geometry by G.A. Wentworth
% ***  Uses  epic  package   ***
% 070aa212.tex
% Pt.212. Fig.a.  (23,16 )
\PGset[0.8em]
\begin{picture}   (23,16 )
\drawline     ( 1, 8 )( 8,15 )(22, 8 )( 8, 1 )( 1, 8 )   %ABCDA
\drawline(1,8)(22,8) % AC
\drawline(8,1)(8,15) % DB
\put( 0.1   ,  7.6 ){$\scriptstyle A$}   %A
\put( 7.6   , 15.2 ){$\scriptstyle B$}   %B
\put(22.2   ,  7.6 ){$\scriptstyle C$}   %C
\put( 7.6   ,  0.1 ){$\scriptstyle D$}   %D
\put( 8.2   ,  8.2 ){$\scriptstyle O$}   %O
\end{picture}
\PGrestore