A curve which can be used to trisect an angle. Although an arbitrary angle cannot be trisected using only compass and straightedge (i.e., according to the strict rules of Greek geometric construction), it can be trisected using certain curves (which are assumed to have been constructed using some other means).
Trisectrix
See also
Angle Trisection, Conchoid of Nicomedes, Cycloid of Ceva, Limaçon, Limaçon Trisectrix, Maclaurin Trisectrix, Quadratrix of Hippias, Rose Curve, Tschirnhausen CubicExplore with Wolfram|Alpha
References
Loy, J. "Trisection of an Angle." http://www.jimloy.com/geometry/trisect.htm#curves.Yates, R. C. The Trisection Problem. Reston, VA: National Council of Teachers of Mathematics, 1971.Referenced on Wolfram|Alpha
TrisectrixCite this as:
Weisstein, Eric W. "Trisectrix." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Trisectrix.html