Hyperbola - The set of all points such that the difference in the distance from two points is a constant.[br][br]Position the Center C, Foci F1 and Vertice V1.[br]Drag the Slider to construct the hyperbola.[br]Press Ctrl-F to clear the tracing of the hyperbola. 

Jerel L. Welker[br]Lincoln Southwest High School Math Department[br]Lincoln, Nebraska[br]jwelker@lps.org