Radial Curve
Let 
be a curve and let 
be a fixed point. Let 
be on and let 
be the Curvature Center at . Let
be the point with 
a line segment Parallel and of equal length to 
. Then the curve traced by is the radial curve of . It was studied by Robert Tucker in 1864. The parametric equations of a curve 
withRadial Point 
are
 |  |  | |
 | |  |
| Curve | Radial Curve |
| Astroid | Quadrifolium |
| Catenary | Kampyle of Eudoxus |
| Cycloid | Circle |
| Deltoid | Trifolium |
| Logarithmic Spiral | Logarithmic Spiral |
| Tractrix | Kappa Curve |
References
Lawrence, J. D. A Catalog of Special Plane Curves. New York: Dover, pp. 40 and 202, 1972. Yates, R. C. ``Radial Curves.'' A Handbook on Curves and Their Properties. Ann Arbor, MI: J. W. Edwards, pp. 172-174, 1952.
- Trinomial
- Trinomial Identity
- Trinomial Triangle
- Triomino
- Triple
- Triple-Free Set
- Triple Jacobi Product
- Triple Point
- Triple Scalar Product
- Triplet
- Trip-Let
- Triple Vector Product
- Triplicate-Ratio Circle
- Trisected Perimeter Point
- Trisection
- Trisectrix
- Trisectrix of Catalan
- Trisectrix of Maclaurin
- Triskaidecagon
- Triskaidekaphobia
- Tritangent
- Tritangent Triangle
- Trivial
- Trivialization
- Trochoid