afstand = 2 (slider from -5 to 5, step 0.1)
Q = (-4, -1)
T: (15, -1)
c = Circle(T, abs(afstand))
r = Ray(Q, T)
g = OrthogonalLine(T, r)
A, B = Intersect(c, g)
f = Line(B, r)
V = Point(r)
helling = 2.129301687433082 rad (slider from ° to 179°, step °)
T' = Rotate(T, helling, V)
s = Line(T', V)
N = Point(f)
U = Intersect(f, s)
β = Angle(U, V, Q)
δ = Angle(N, U, V)
h = Line(A, r)
C = Intersect(s, h)
α = Angle(V, U, B)
η = Angle(V, C, A)
D = Point(s)
E = Point(h)
θ = Angle(V, C, E)
ι = Angle(E, C, D)
κ = Angle(D, C, A)
λ = Angle(Q, V, C)
μ = Angle(C, V, T)
ν = Angle(T, V, T')
ε = Angle(T', U, B)
ζ = Angle(T', U, N)