O = (8.2, 0.14)
c = Circle(O, 5.0)
A = Point(c)
M = Point(c)
B = Point(c)
a = Ray(M, A)
b = Ray(M, B)
d = CircleArc(O, B, A)
e = Ray(O, A)
f = Ray(O, B)
α = Angle(B, M, A)
β = Angle(B, O, A)