c = Circle((0, 0), 1)
O = Center(c)
A = Point(c)
f = Line(O, A)
B = Intersect(c, f, 2)
h = Segment(A, O)
i = Segment(O, B)
M = (-1.478263508885577, 0.8994312252946188)
N = (-0.2703174204810482, 0.6808883474582746)
t1, b, m, a = Polygon(M, A, B)
t2, n, a_1, b_1 = Polygon(A, B, N)
α = Angle(A, M, B)
β = Angle(A, N, B)