B = (0, 0)
a = 2 (slider from -5 to 5, step 0.1)
c: x = a
A: (a, 0)
Q_1 = Point(c)
b = Line(B, Q_1)
d = Circle(Q_1, A)
P, P' = Intersect(d, b)
e = Segment(P, Q_1)
f = Segment(Q_1, A)
g = Segment(Q_1, P')
Ortslinie1 = Locus(P, Q_1)
Ortslinie2 = Locus(P', Q_1)
Q_2 = Point(yAxis)
h = Line(Q_2, A)
i = Line(B, Q_2)
k = Circle(B, Q_2)