Ellipse
An Ellipse is traditionally defined as the
locus of point such that the sum of the distance
from two fixed points F and F' is constant.
Let's try to drag P on FF'DYou can find
Ellipse as the locus.
The effect of Traceiusing controller as
below)
Select Choice of trace Select a point
P and it's point of symmetry Select Animation
spring Drag P on FFfiappear spring!jD
And then Double Click.
Controller
| Backward step | Forward step | { | Figure drag | Choice of trace | Animation spring | Downloard of figure |
with Cabri Java