P = (1.7, -4.2)
S = (-1.8, -3.72)
Q = (0.46, -1.68)
α = Angle(P, S, Q)
f = Ray(S, P)
g = Ray(S, Q)
c = Circle(S, P)
A = Intersect(c, g)
d = Circle(P, S)
e = Circle(A, S)
B, C = Intersect(e, d)
w = Line(S, C)