A Hyperbola for which the Asymptotes are Perpendicular. This occurs when the
Semimajor and Semiminor Axes are equal. Taking in the equation
of a Hyperbola with Semimajor Axis parallel to the *x*-Axis and Semiminor Axis parallel to the
*y*-Axis (i.e., vertical Directrix),

therefore gives

A special type of right hyperbola is the so-called Rectangular Hyperbola, which has equation .

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1999-05-25