Definition of

Ellipse

Ellipse

An ellipse usually looks like a squashed circle (in fact a circle is a special kind of ellipse).

It has two focus point F and G, and for any point P on an ellipse the total distance from F to P to G is always the same.

It is one of the Conic Sections.

Play with it here:

../geometry/images/geom-ellipse.js?mode=foci