X

|EX| + |FX| = 2a

|EF| < 2a

Myší táhni za bod X, který opisuje elipsu.

2a

a = 2
E: ((-a), 0)
B: (a, 0)
b = Segment(E, B)
F = Point(b)
e = Circle(F, a)
H = (-1.6686051001090474, -4.660094519847377)
I = (4.238890176469009, -4.672992981149949)
c = LineBisector(E, F)
C = Intersect(e, c, 2)
d = Ellipse(E, F, C)
X = Point(d)
f = Segment(E, X)
g = Segment(F, X)
h = Segment(F, E)
Q: X
E' = (-2.7520758495251103, -1.9772145689123641)
F' = Point(Circle[E', (2 * a)])
i = Segment(E', F')
k = Circle(E', Distance[E, X])
X' = Intersect(k, i, 1)
j = Segment(X', F')
l = Segment(E', X')
m = Segment(E, F)
n = Segment(E' + (0, -1), E')
p = Segment(F' + (0, -1), F')
A: F' + (0, (-0.8))
D: E' + (0, (-0.8))
G = Midpoint(D, A)
u = Vector(G, D)
v = Vector(G, A)