A = (2.8495813953488374, -1.5392093023255797)
B = (6.819813953488372, 2.922186046511629)
O = (6.74, -2.32)
c = Circle(O, A)
a = Line(A, B)
M = Intersect(c, a, 2)
α = Angle(O, A, B)
b = Segment(O, A)