Longueur

A = Intersect(xAxis, yAxis)
B = (18.26, 10.38)
C = Point(yAxis)
D = Point(yAxis)
E = (20, 3)
F = (20, 5)
a = Line(D, F)
b = Line(C, E)
P1 = Point(b)
c = OrthogonalLine(P1, a)
P2 = Intersect(a, c)
d = Segment(A, P1)
e = Segment(P1, P2)
f = Segment(P2, B)
g = Segment(A, B)
ChampTexte1 = Textfield(d)
h: d + e + f
Trajet: "longueur=" + (LaTeX[h]) + ""
I = Midpoint(P2, P1)