O = Intersect(xAxis, yAxis)
A = (1, 0)
C = Point(yAxis)
B = (-1, 0)
c = CircumcircleArc(A, C, B)
P = Point(c)
F: (x(P), 0.0)
a = Segment(O, F)
b = Segment(P, O)
α = Angle(A, O, P)
G: (x(P), α)
α' = Segment(G, F)
H = Intersect(b, α')