A = (4.92, -1.3)
B = (10.78, -1.28)
k = Semicircle(A, B)
a = Segment(A, B)
b = LineBisector(A, B)
M = Intersect(b, a)
Ziehen = 1.5009831567151235 rad (slider from 0 to 3.141592653589793, step 0.017453292519943295)
B' = Rotate(B, Ziehen, M)
β = Angle(B, M, B')
c = Segment(B', A)
d = Segment(B', B)
γ = Angle(A, B', B)
α = Angle(M, A, B')
δ = Angle(B', B, M)