a = 1 (slider from -5 to 5)
b = 0 (slider from -5 to 5)
f: y = (a * x) + b
A = Point(f)
B = Point(f)
g = OrthogonalLine(B, xAxis)
h = OrthogonalLine(A, g)
α_1 = Angle(g, h)
C = Intersect(g, h)
α = Angle(C, A, B)
i = Segment(B, C)
j = Segment(A, C)
β = Angle(A, C, B)
γ = Angle(B, A, C)