A triangle line is a line with trilinear equation
defined relative to a reference triangle. A triangle line is called a central line iff is a triangle center (Kimberling 1998, p. 127).
A triangle line is a line with trilinear equation
defined relative to a reference triangle. A triangle line is called a central line iff is a triangle center (Kimberling 1998, p. 127).
Weisstein, Eric W. "Triangle Line." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/TriangleLine.html