O = (35.74050490024738, 0.7510240335388564)
B = (51.747617342721945, 0.7865953945221332)
a = Segment(O, B)
b = OrthogonalLine(O, a)
A = Point(b)
c = Segment(A, B)
d = Segment(A, O)
e = OrthogonalLine(O, c)
M = Intersect(e, c)
f = Segment(O, M)
α = Angle(O, M, B)