v = Vector((1, -2, 4))
u = Vector((4, -1, -5))
α = Angle(v, u)
f = IntersectPath(x / 4 + (0 * z) = (y - 1) / -1, x / 4 = (z + 3) / -5)
A: (0, 1, -3)
a: x - (2 * y) + (4 * z) = -3
β = Angle(f, a)