B1 = Point(yAxis)
F1 = Point(xAxis)
C = Intersect(xAxis, yAxis)
F2 = Mirror(F1, yAxis)
c = Ellipse(F1, F2, B1)
f = Segment(F2, F1)
A2, A1 = Intersect(c, xAxis)
A, B2 = Intersect(c, yAxis)
P = Point(c)
d2 = Segment(F2, P)
d1 = Segment(P, F1)
ecuacion: x(P)^(2) / x(A1)^(2) + y(P)^(2) / y(B1)