C = (4.64, -0.34)
B = (-0.84, 0.9)
a = Segment(C, B)
O = Midpoint(a)
c = Circle(O, C)
K = Point(c)
M = Point(c)
b = Segment(O, K)
d = Segment(K, M)
e = Segment(M, C)
α = Angle(C, M, K)
β = Angle(b, a)
A1 = Angle(b, a)
B1 = Angle(C, M, K)
C1: A1 / 2 + B1