D: (11, -3)
A: (x(D), y(D) + 100)
h = Ray(D, A)
A_1 = Point(h)
g: y = y(A_1)
B_1 = Point(g)
p: y = y(A)
j = Line(D, g)
G = Point(j)
s = Line(B_1, G)
B = Point(h)
f = Line(B, g)
U = Intersect(s, f)
F = Intersect(p, s)
α = Angle(F, B_1, A_1)
γ = Angle(F, G, D)
I = (-4.59110465348455, -4.191796636727371)
ε = Angle(F, U, B)