The pedal coordinates of a point with respect to the curve and the Pedal Point are the radial distant from to and the Perpendicular distance from to the line tangent to at .

**References**

Lawrence, J. D. *A Catalog of Special Plane Curves.* New York: Dover, pp. 2-3, 1972.

Yates, R. C. ``Pedal Equations.'' *A Handbook on Curves and Their Properties.* Ann Arbor, MI: J. W. Edwards, pp. 166-169, 1952.

© 1996-9

1999-05-26