P1 = (-1.6, 0.43438499999999997)
B = (4.32, 0.517125)
a = Line(P1, B)
P3 = (4, 4.654125)
b = OrthogonalLine(P3, a)
P2 = Intersect(a, b)
g3 = Segment(P1, P3)
g2 = Segment(P1, P2)
g1 = Segment(P2, P3)
Term1: g1 / g2
Term2: g2 / g3
Term3: g1 / g3
α = Angle(P2, P1, P3)
β = Angle(P1, P3, P2)