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function trcercle(centre, rayon, style) theta = linspace(0,2*pi, 300); x = centre(1)+rayon*cos(theta); y = centre(2)+rayon*sin(theta); plot(x,y,style); axis([centre(1)-2*rayon centre(1)+2*rayon centre(2)-2*rayon centre(2)+2*rayon]); set(gca, 'PlotBoxAspect', [1 1 1]);
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