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https://www.geogebra.org/haftendorn
Haftendorn, Buch (Springer):
Kurven erkunden und verstehen
Kap 4.1.3 Afg 4.2 S. 85

Ha 2016

a = 2
M: (0, a)
O = (0, 0)
c = Circle(M, O)
g_w: y = (2 * a)
Q = Point(c)
d = Line(O, Q)
e = OrthogonalLine(Q, yAxis)
E_w = Intersect(d, g_w)
f = OrthogonalLine(E_w, e)
P_w = Intersect(e, f)
Ortslinie1 = Locus(P_w, Q)
g_e = OrthogonalLine(M, yAxis)
E_e = Intersect(g_e, d)
h = OrthogonalLine(E_e, g_e)
P_e = Intersect(e, h)
Ortslinie2 = Locus(P_e, Q)
W: ((2 * a / sqrt(3)), (3 * a / 2))
W' = Mirror(W, yAxis)
T = Point(g_w)
k = Circle(T, a)
N: (0, (2 * a))
H: (a, (3 * a))
H' = Mirror(H, yAxis)
p = Circle(N, H)
J, K = Intersect(p, yAxis)
S = Midpoint(K, N)
q = Circle(S, N)
i = Segment(O, E_w)
j = Segment(E_e, P_e)
l = Segment(P_e, Q)
m = Segment(Q, P_w)
n = Segment(P_w, E_w)
r = CircleArc(N, H, K)
b = true