@options; @figure; A = point(-2,1) {i}; B = point(2,1) {i}; sAB =segment(A,B); I =milieu(A,B) {i}; sIB =segment(I,B); M =pointsur(sAB,0.62) {vertfonce}; d =perpendiculaire(M,sAB) {i}; X =intersection(d,sIB) {i}; C = point(0,0) {i}; J =milieu(X,C) {i}; sc_J =symetrie(J); Z =image(sc_J,X) {rouge,3};