A = (-0.8362422375224573, -0.3610935984956839)
B = (0.45227114922215594, -0.33501033155753385)
a = Segment(A, B)
b = OrthogonalLine(A, a)
A' = Rotate(A, 310.0*°, B)
α = Angle(A', B, A)
c = Line(B, A')
C = Intersect(b, c)
d = Segment(C, B)
e = Segment(C, A)
β = Angle(B, A, C)