γ=180°-2α

A = (4.84, -1.82)
B = (10.18, -1.82)
c = Segment(A, B)
m = LineBisector(A, B)
C = Point(m)
b = Segment(C, A)
a = Segment(C, B)
M = Intersect(m, c)
α = Angle(M, A, C)
β = Angle(C, B, M)
γ = Angle(A, C, B)