input geom2d; beginfig(1); A = Point(0,0); B = Point(7,0.3); C = Point(1,3); TABC = Triangle(A,B,C); D = Orthocentre(TABC); C_C = CercleCirconscrit(TABC); C_E = CercleEuler(TABC); trace TABC; trace C_C withcolor DarkBlue; trace C_E withcolor DarkRed; pointe A; pointe B; pointe C; pointe D; pointe Centre(C_C); pointe Centre(C_E); marque.lft "A"; marque.rt "B"; marque.lft "C"; marque.rt "D"; endfig; end.