Ha 2016

https://www.geogebra.org/haftendorn
Haftendorn, Buch (Springer):
Kurven erkunden und verstehen
Kap 3.1.1: S. 40
www.kurven-erkunden-und-verstehen.de

a = 1 (slider from -5 to 5, step 1)
k = 3 (slider from -5 to 5, step 0.1)
c: y = a
Q = Point(c)
B = Intersect(xAxis, yAxis)
b = Line(Q, B)
c_1 = Circle(Q, k)
P, P' = Intersect(c_1, b)
Ortslinie1 = Locus(P', Q)
Ortslinie2 = Locus(P, Q)
d = Segment(Q, P)
e = Segment(Q, P')
f = false