WOLFRAM|DEMONSTRATIONS PROJECT

Conic Sections: Move Foci

​
adjust
a
ellipse
hyperbola
parabola
ellipse : e = c/a = 0.67
c = 1., a = c × 1.5 = 1.5, b =
2
a
-
2
c
= 1.12
●
measurements
asymptotes
directrix
Adjust the location of either focus (the purple points). You can change the eccentricity by controlling how
a
relates to
c
.