\input fig4tex.tex

% 1. Definition of characteristic points
\figinit{2pt}
\figpt 0:(0,0)
\figpt 1:(55,35)
\figpt 2:(25,0)
% 2. Creation of the postscript file
\figdrawbegin{}
\figdrawarcell 0;50,30 (0,360,30)
\figptsinterlinell 3 [0,50,30,30 ; 1,2]
\figset (color=\Redrgb, width=2)
\figdrawline[1,2]
\figset (color=default, width=default)
\figdrawline[3,4]
\figdrawend
% 3. Writing text on the figure
\figvisu{\figBoxA}{Points 3 et 4 = intersection of the ellipse with line(1,2)}{%
\figshowpts[1,4]
}
\centerline{\box\figBoxA}
\bye