hellingzwlijn = 0.6981317007977318 rad (slider from 0 to 179° - hellingrolijn, step °)
B = (11, -3)
A = (1, -3)
f = Line(A, B)
C = Point(f)
A' = Rotate(A, (-hellingzwlijn), C)
stap = 30 (slider from 0 to 30, step 1)
hellingrolijn = 0.6108652381980153 rad (slider from 0 to 179°, step °)
B' = Rotate(B, hellingrolijn, C)
g = Ray(B', C)
D = Point(g)
h = Ray(A', C)
E = Point(h)
i = Segment(D, B')
ζ = Angle(D, C, E)
η = Angle(B', C, E)
j = Segment(E, A')
ε = Angle(A', C, D)
δ = Angle(B', C, A')