Negative Pedal Curve
Given a curve 
and 
a fixed point called the Pedal Point, then for a point 
on , draw a LinePerpendicular to 
. The Envelope of these Lines as describes the curve is thenegative pedal of .
References
Lawrence, J. D. A Catalog of Special Plane Curves. New York: Dover, pp. 46-49, 1972.
Lockwood, E. H. ``Negative Pedals.'' Ch. 19 in A Book of Curves. Cambridge, England: Cambridge University Press, pp. 156-159, 1967.
- Gyroelongated Pentagonal Birotunda
- Gyroelongated Pentagonal Cupola
- Gyroelongated Pentagonal Cupolarotunda
- Gyroelongated Pentagonal Pyramid
- Gyroelongated Pentagonal Rotunda
- Gyroelongated Pyramid
- Gyroelongated Rotunda
- Gyroelongated Square Bicupola
- Gyroelongated Square Cupola
- Gyroelongated Square Dipyramid
- Gyroelongated Square Pyramid
- Gyroelongated Triangular Bicupola
- Gyroelongated Triangular Cupola
- Gårding's Inequality
- Göbel's Sequence
- Gödel Number
- Gödel's Completeness Theorem
- Gödel's Incompleteness Theorem
- Haar Function
- Haar Integral
- Haar Measure
- Haar Transform
- Haberdasher's Problem
- Hadamard Design
- Hadamard Matrix