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

@figure;
  O = point( -0.23 , -0.67 );
  cerayO4 = cerclerayon( O , 4 );
  M = point( 4.77 , 7.23 )  { fixe };
  H = pointsur( cerayO4 , 112.41 );
  sOH = segment( O , H );
  sHM = segment( H , M );
  sOM = segment( O , M );
  polyOHM = polygone( O , H , M  )  { vert , plein30 };