r = 2
F: (((-2) * r), 0)
Q = Point(yAxis)
c = Semicircle(Q, F)
d = Circle(Q, (2 * r))
A = Intersect(d, c)
a = Segment(Q, A)
b = Segment(A, F)
P = Midpoint(Q, A)
Ortslinie1 = Locus(P, Q)