Parabola.2.0.

A = Point(yAxis)
B = Point(yAxis)
vezéregyenes = OrthogonalLine(B, yAxis)
parabola = Parabola(A, vezéregyenes)
C = Point(parabola)
c = Circle(C, A)
D, E = Intersect(c, vezéregyenes)
f = Segment(C, A)
g = Segment(C, D)