% Diagram by nilrem for PGDP project: Plane Geometry by G.A. Wentworth
% 025aaZ86.tex
% Pt.86. Fig.a. (20, 9 )
\PGset[0.8em]
\begin{picture} (20, 9 )
\put( 1     ,  1   ){\line  ( 1, 0 ){18   }}  %A(O)B
\put(10     ,  1   ){\line  ( 5, 6 ){ 6   }}  %OD
\put( 0.2   ,  1   ){$\scriptstyle A$}   %A
\put(19.1   ,  1   ){$\scriptstyle B$}   %B
\put(16     ,  7.9 ){$\scriptstyle D$}   %D
\put( 9.6   ,  0.2 ){$\scriptstyle O$}   %O
\end{picture}
\PGrestore