Bewege Q auf und ab 
mit den Pfeiltasten

Hüllkurve

https://www.geogebra.org/haftendorn
Haftendorn, Buch (Springer):
Kurven erkunden und verstehen
Kap 9.5.2: S.288
www.kurven-erkunden-und-verstehen.de

Ha 2016

a: 2
k: 2
M: (0, 0)
c = Circle(M, k)
Q = (3, 2)
Q' = Mirror(Q, c)
f = Line(M, Q)
B_1 = (2.08, 2.94)
B = (3.68, -0.4)
C = (4.4, -0.06)
D = (4.4, -1.26)
E = (1.96, -1.26)
F = Point(c)
G = (-0.94, -0.24)
H = (1.66, 0.5)
K = (-2.1, 2.8)
N = (2.16, -2.56)
O = (4.58, -1.6)
L = (-1.3, -1.52)
g = OrthogonalLine(Q, xAxis)
Q_1 = (0.56, 0.96)
g' = Mirror(g, c)
d = Parabola(M, g)
d' = Mirror(d, c)
h = Segment(M, Q')
h' = Mirror(h, c)
Q_2 = Point(g)
i = LineBisector(M, Q_2)
i' = Mirror(i, c)
b = true
e = false