What definition (and theorem) is dynamically illustrated below?
(Feel free to move the white point anywhere you'd like!)
Definition of a Hyperbola:
A hyperbola is a locus (set of points) in a plane, the difference of whose distances from two fixed points (called foci) is constant.
Theorem:
The value of this constant difference in a hyperbola is equal to the length of the hyperbola's transverse axis.
