Α = (-1.92, 4.18)
Β = (2.82, 4.14)
R_1 = Segment(Α, Β)
O = (6.72, -2.68)
c = Circle(O, ΑΒ)
A = Point(c)
R = Segment(A, O)
B = Rotate(A, 36.0*°, O)
α = Angle(A, O, B)
x_1 = Segment(O, B)
x_3 = Segment(A, B)
e = AngularBisector(B, A, O)
Δ = Intersect(e, x_1)
x_2 = Segment(A, Δ)
β = Angle(Δ, A, O)
γ = Angle(B, A, Δ)
δ = Angle(O, B, A)