input geometrie2d;

beginfig(1);
    
    A = Point(0,0); 
    B = Point(8,0); 
    C = Point(6,4);
    
    T = Triangle(A,B,C);
    c = CercleCirconscrit(T);
    O = Centre(c);
    
    trace T 
	withpen pencircle scaled 1.5 pt withcolor 0.6red;

    trace c 
	withpen pencircle scaled 1pt withcolor 0.6white;

    marque.llft "A";
    marque.lrt  "B";
    marque.urt  "C";
    marque.urt  "O";

endfig;
end