A = (-4.56, 1.5)
B = (0.9, 1.42)
c = Segment(A, B)
A' = Rotate(A, (-(40°)), B)
β = Angle(A', B, A)
a_1 = Ray(B, A')
d = Circle(B, 4.3)
C = Intersect(d, a_1)
a = Segment(B, C)
b = Segment(A, C)