Directrix (Conic Section)

The Line which, together with the point known as the Focus, serves to define a Conic Section.

References

Coxeter, H. S. M. Introduction to Geometry, 2nd ed. New York: Wiley, pp. 115-116, 1969.

Coxeter, H. S. M. and Greitzer, S. L. Geometry Revisited. Washington, DC: Math. Assoc. Amer., pp. 141-144, 1967.

• Hyperbolic Fixed Point (Differential Equations)
• Hyperbolic Fixed Point (Map)
• Hyperbolic Functions
• Hyperbolic Geometry
• Hyperbolic Inverse Functions
• Hyperbolic Knot
• Hyperbolic Lemniscate Function
• Hyperbolic Map
• Hyperbolic Metric
• Hyperbolic Octahedron
• Hyperbolic Paraboloid
• Hyperbolic Partial Differential Equation
• Hyperbolic Plane
• Hyperbolic Point
• Hyperbolic Polyhedron
• Hyperbolic Rotation
• Hyperbolic Rotation (Crossed)
• Hyperbolic Secant
• Hyperbolic Sine
• Hyperbolic Space
• Hyperbolic Spiral
• Hyperbolic Spiral Inverse Curve
• Hyperbolic Spiral Roulette
• Hyperbolic Substitution
• Hyperbolic Tangent