%figshell.tex  REMOVE this line for actual diagram file
% 027aaZ93.tex
% Pt.93. Fig.a. (18,10 )
\PGset[0.8em]
\begin{picture} (18,10 )
\put( 1     ,  1   ){\line  ( 2, 1 ){16   }}  %ACB
\put( 1     ,  9   ){\line  ( 2,-1 ){16   }}  %OCP
\put( 0.2   ,  0.8 ){$\scriptstyle A$}   %A
\put(17     ,  8.7 ){$\scriptstyle B$}   %B
\put( 8.5   ,  4   ){$\scriptstyle C$}   %C
\put(17.1   ,  0.6 ){$\scriptstyle P$}   %P
\put( 0.2   ,  8.7 ){$\scriptstyle O$}   %O
\end{picture}
\PGrestore