A_1 = (-1.544047936535363, -0.16232898210418348)
B_1 = (1.109611803542724, -0.16983579890779898)
a = Line(A_1, B_1)
C = (1.1771731547752637, 1.0988162409032243)
A = (-1.0260775770858919, -0.16983579890779898)
b = OrthogonalLine(A, a)
B = Point(b)
c = OrthogonalLine(B, b)
d = OrthogonalLine(C, c)
e = Segment(C, B)
H = Intersect(d, a)
D = Intersect(d, c)
α = Angle(D, B, C)