% Flexaèdre 
% 
% Le polyèdre flexible le plus simple connu à ce jour
% Calcul de la figure par un utilitaire à partir de sa
% description
% \usepackage{epic,eepic}
%
% Févr. 2004 Jean-Paul Davalan
% http://perso.wanadoo.fr/jean-paul.davalan/divers/a4/index.html#flexaedre
%
% See also
% Steffen's Simplest Known Flexible Polyhedron
% http://www.geocities.com/jshum_1999/polyhedra/steffen.htm
% Jonathan Shum McGill University, Montreal, Canada. 
% 
\setlength{\unitlength}{7.1mm}
\thinlines
\begin{picture}(20,20)(4.7,17)
\dashline{0.5}(10.0000,11.0000)(10.0000,28.0000) % A0 A1
\path(10.0000,11.0000)(1.5295,19.5000) % A0 C
\dashline{0.5}(10.0000,28.0000)(1.5295,19.5000) % A1 C
\dashline{0.5}(10.0000,11.0000)(18.4705,19.5000) % A0 D
\path(10.0000,28.0000)(18.4705,19.5000) % A1 D
\path(10.0000,11.0000)(19.3388,14.5760) % A0 G0
\dashline{0.5}(10.0000,11.0000)(16.9740,3.8332) % A0 F0
\dashline{0.5}(10.0000,11.0000)(14.1184,-0.2712) % A0 E0
\dashline{0.5}(14.1184,-0.2712)(16.9740,3.8332) % E0 F0
\path(16.9740,3.8332)(19.3388,14.5760) % F0 G0
\path(19.3388,14.5760)(18.4705,19.5000) % G0 D
\dashline{0.5}(16.9740,3.8332)(20.8022,0.6169) % F0 H0
\dashline{0.5}(16.9740,3.8332)(28.5724,6.9117) % F0 I0
\path(19.3388,14.5760)(28.5724,6.9117) % G0 I0
\dashline{0.5}(20.8022,0.6169)(28.5724,6.9117) % H0 I0
\path(19.3388,14.5760)(24.1637,15.8874) % G0 J0
\dashline{0.5}(28.5724,6.9117)(24.1637,15.8874) % I0 J0
\dashline{0.5}(18.4705,19.5000)(19.3388,24.4240) % D G1
\dashline{0.5}(10.0000,28.0000)(19.3388,24.4240) % A1 G1
\path(19.3388,24.4240)(16.9740,35.1668) % G1 F1
\path(10.0000,28.0000)(16.9740,35.1668) % A1 F1
\dashline{0.5}(10.0000,28.0000)(14.1184,39.2712) % A1 E1
\path(16.9740,35.1668)(14.1184,39.2712) % F1 E1
\dashline{0.5}(19.3388,24.4240)(24.1637,23.1126) % G1 J1
\dashline{0.5}(19.3388,24.4240)(28.5724,32.0883) % G1 I1
\path(16.9740,35.1668)(28.5724,32.0883) % F1 I1
\path(16.9740,35.1668)(20.8022,38.3831) % F1 H1
\dashline{0.5}(28.5724,32.0883)(24.1637,23.1126) % I1 J1
\dashline{0.5}(20.8022,38.3831)(28.5724,32.0883) % H1 I1
\dashline{0.2}(16.9740,3.8332)(16.8011,1.8337)(15.9330,0.5860)(14.1184,-0.2712) % F0 E0 2.000000
\dashline{0.2}(14.1184,39.2712)(15.9330,38.4140)(16.8011,37.1663)(16.9740,35.1668) % E1 F1 2.000000
\dashline{0.2}(20.8022,38.3831)(22.7837,38.0648)(27.8498,33.9606)(28.5724,32.0883) % H1 I1 2.000000
\dashline{0.2}(18.4705,19.5000)(19.7575,17.9601)(20.0214,16.4632)(19.3388,14.5760) % D G0 2.000000
\dashline{0.2}(19.3388,24.4240)(20.0214,22.5368)(19.7575,21.0399)(18.4705,19.5000) % G1 D 2.000000
\dashline{0.2}(14.1184,-0.2712)(12.5819,1.0200)(9.6579,9.0225)(10.0000,11.0000) % E0 A0 2.000000
\dashline{0.2}(10.0000,28.0000)(9.6579,29.9775)(12.5819,37.9800)(14.1184,39.2712) % A1 E1 2.000000
\dashline{0.2}(24.1637,15.8874)(25.8284,14.7665)(28.7028,8.9144)(28.5724,6.9117) % J0 I0 2.000000
%\input comment.t
\end{picture}