@options;
  repereortho(310,270,30,1,1){ 0 , moyen , noir , num1 ,i};

@figure;
  O = point( -0.4 , -0.37 );
  cerayO4 = cerclerayon( O , 4 );
  M = point( 4.43 , 3.93 )  { (0.6,-0.77) };
  cediaOM = cercledia( O , M )  { i };
  H = intersection( cediaOM , cerayO4 , 2 )  { (-0.6,-1.03) };
  demiMO = demidroite( M , O )  { sapin , sansnom };
  B = intersection( demiMO , cerayO4 , 1 )  { (-0.27,0.17) };
  A = intersection( demiMO , cerayO4 , 2 )  { (0.47,-0.23) };
  var x =MA { 2.47021487707754 };
  var y =MB { 10.4702148770775 };
  var z =MH { 5.08563472494393 };
  texte1 = texte( -6.6 , 6.3 ,"MA = $x$")  { noir , dec2 };
  texte2 = texte( -6.6 , 5.3 ,"MB = $y$")  { noir , dec2 };
  texte3 = texte( -6.6 , 4.3 ,"MH = $z$")  { noir , dec2 };
  sMH = segment( M , H )  { noir , 2 };
  demiMH = demidroite( M , H )  { 7 , sansnom };