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Concept

# Hyperbola

A hyperbola is the set of all points in a plane such that the absolute value of the differences of the distances from two fixed points, called the foci, is constant.
Every hyperbola has two axes of symmetry. One runs through both foci, known as the transverse axis, while the other, perpendicular to the first, is equidistant from both curves, called the conjugate axis. For this hyperbola the transverse axis and conjugate axis are the axis and axis, respectively.

In this graph the transverse axis runs horizontally. There are also vertical hyperbolas, where the transverse axis is vertical. Below you can find the properties of both types of hyperbolas.

Property Horizontal Hyperbola Vertical Hyperbola
General Equation
Transverse Axis Horizontal Vertical
Vertices
Foci
Asymptotes

Although these curves are not considered to be parabolas, they do have foci and directrices as parabolas do.