@options;

@figure;
  A = point(-2,1)  {i};
  B = point(2,1)  {i};
  sAB =segment(A,B);
  I =milieu(A,B)  {noir};
  sIB =segment(I,B)  {orange};
  M =pointsur(sAB,0.64)  {vertfonce};
  d =perpendiculaire(M,sAB);
  X =intersection(d,sIB)  {noir,(-0.25,-0.82)};
  C = point(1,-0.4)  {noir};
  J =milieu(X,C)  {noir};
  sc_J =symetrie(J);
  Z =image(sc_J,X)  {rouge,3,(-0.52,-0.03)};