A_1 = (-5.0054854545454415, -4.387258181818182)
B_1 = (21.196514545454555, -4.211258181818181)
a_1 = Line(A_1, B_1)
O = (-2.5854854545454424, -2.2532581818181807)
b_1 = Line(O, a_1)
A = (11.802514545454557, 4.566741818181819)
c = OrthogonalLine(A, a_1)
B = Intersect(b_1, c)
D = Intersect(a_1, c)
d = Segment(A, D)
e = Segment(O, A)
f = OrthogonalLine(O, a_1)
C = Intersect(a_1, f)
g = Segment(O, C)
h = Segment(O, B)
a = Segment(C, D)
E = Point(h)
i = OrthogonalLine(E, a_1)
F = Intersect(i, a_1)
b = Segment(E, F)
α = Angle(B, O, A)