droite d'horizon

a = (1.02, 1.46)
d = (1.94, -0.3)
D = (-3.22, 6.2)
E = (3.38, 4.12)
a_1 = Line(D, E)
c = (4.8646, 0.358)
g = (6, 1.6)
j = (-2.23, 0.77)