A = (4, -7)
B = Point(xAxis)
E = (10, 11)
a = Segment(A, B)
b = Segment(B, E)
c = Line(A, b)
d = Line(E, a)
F = Intersect(c, d)
e = Segment(F, B)
f = Segment(A, E)
C = Intersect(e, f)
u = Vector(A, B)
v = Vector(A, E)
P, a_1, b_1, e_1, f_1 = Polygon(A, B, E, F)
g = OrthogonalLine(C, u)
D = Intersect(g, a)
h = Segment(C, D)