Antipedal Line

If P is a point on the circumcircle of a reference triangle, then the line PP^(-1), where P^(-1) is the isogonal conjugate of P, is called the antipedal line of P. It is a central line if P is a center (Kimberling 1998, p. 150).

See also

Antipedal Triangle, Central Line, Isogonal Conjugate, Pedal Line

Explore with Wolfram|Alpha


Kimberling, C. "Triangle Centers and Central Triangles." Congr. Numer. 129, 1-295, 1998.

Referenced on Wolfram|Alpha

Antipedal Line

Cite this as:

Weisstein, Eric W. "Antipedal Line." From MathWorld--A Wolfram Web Resource.

Subject classifications