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