% Diagram by nilrem for PGDP project: Plane Geometry by G.A. Wentworth
% ***  Uses  epic  &  eepic  packages   ***
% 089aa241.tex
% Pt.241. Fig.a.   (12,11 )
\PGset[0.8em]
\begin{picture}    (12,11 )

% Ellipse:  u = 5.5  v = 5.5  a = 5.0  b = 5.0  phi = 0.0 Grad
\qbezier(10.5, 5.5)(10.5, 7.5711)(9.0355, 9.0355)
\qbezier(9.0355, 9.0355)(7.5711, 10.5)(5.5, 10.5)
\qbezier(5.5, 10.5)(3.4289, 10.5)(1.9645, 9.0355)
\qbezier(1.9645, 9.0355)(0.5, 7.5711)(0.5, 5.5)
\qbezier(0.5, 5.5)(0.5, 3.4289)(1.9645, 1.9645)
\qbezier(1.9645, 1.9645)(3.4289, 0.5)(5.5, 0.5)
\qbezier(5.5, 0.5)(7.5711, 0.5)(9.0355, 1.9645)
\qbezier(9.0355, 1.9645)(10.5, 3.4289)(10.5, 5.5)

\dashline[80]{0.4}(10.5, 5.5 )( 5.5, 5.5 )( 8.5, 9.5 )     %AOB
\dashline[80]{0.4}            ( 5.5, 5.5 )( 2.5, 9.5 )     %OF
\drawline     ( 8.5, 9.5 )(10.5, 5.5 )( 2.5, 9.5 )     %BAF
\put( 10.6 ,  5.2 ){$\scriptstyle A$}   %A
\put(  8.5 ,  9.6 ){$\scriptstyle B$}   %B
\put(  2.1 ,  9.6 ){$\scriptstyle F$}   %F
\put(  5.1 ,  4.7 ){$\scriptstyle O$}   %O
\end{picture}
\PGrestore
%
\qquad
% 089bb241.tex
% Pt.241. Fig.b.   (12,11 )
\PGset[0.8em]
\begin{picture}    (12,11 )

% Ellipse:  u = 5.5  v = 5.5  a = 5.0  b = 5.0  phi = 0.0 Grad
\qbezier(10.5, 5.5)(10.5, 7.5711)(9.0355, 9.0355)
\qbezier(9.0355, 9.0355)(7.5711, 10.5)(5.5, 10.5)
\qbezier(5.5, 10.5)(3.4289, 10.5)(1.9645, 9.0355)
\qbezier(1.9645, 9.0355)(0.5, 7.5711)(0.5, 5.5)
\qbezier(0.5, 5.5)(0.5, 3.4289)(1.9645, 1.9645)
\qbezier(1.9645, 1.9645)(3.4289, 0.5)(5.5, 0.5)
\qbezier(5.5, 0.5)(7.5711, 0.5)(9.0355, 1.9645)
\qbezier(9.0355, 1.9645)(10.5, 3.4289)(10.5, 5.5)

\dashline[80]{0.4}(10.5, 5.5 )( 5.5, 5.5 )( 8.5, 9.5 )     %AOB
\drawline     ( 8.5, 9.5 )(10.5, 5.5 )                 %B'A'
\put( 10.6 ,  5.2 ){$\scriptstyle A'$}   %A'
\put(  8.5 ,  9.6 ){$\scriptstyle B'$}   %B'
\put(  4.9 ,  4.6 ){$\scriptstyle O'$}   %O'
\end{picture}
\PGrestore