The line through a triangle polygon vertex obtained by reflecting an initial line (also through a polygon vertex) about the angle bisector. If three lines from the polygon vertices of a triangle are concurrent at , then their isogonal lines are also concurrent, and the point of concurrence is called the isogonal conjugate point.
Isogonal Line
See also
Isogonal ConjugateExplore with Wolfram|Alpha
References
Johnson, R. A. Modern Geometry: An Elementary Treatise on the Geometry of the Triangle and the Circle. Boston, MA: Houghton Mifflin, pp. 153-157, 1929.Referenced on Wolfram|Alpha
Isogonal LineCite this as:
Weisstein, Eric W. "Isogonal Line." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/IsogonalLine.html