A = (-1.64, -0.22)
B = (2.86, -0.92)
a = Segment(A, B)
b = OrthogonalLine(B, a)
C = Point(b)
c = OrthogonalLine(C, b)
d = OrthogonalLine(A, a)
D = Intersect(c, d)
e = Segment(B, C)
f = Segment(C, D)
g = Segment(D, A)
α = Angle(B, A, D)
γ = Angle(D, C, B)
β = Angle(C, B, A)