Central Conic

An Ellipse or Hyperbola.

See also Conic Section

References

Coxeter, H. S. M. and Greitzer, S. L. Geometry Revisited. Washington, DC: Math. Assoc. Amer., pp. 146-150, 1967.

Ogilvy, C. S. Excursions in Geometry. New York: Dover, p. 77, 1990.