Yff Triangles
The Triangle 
formed by connecting the points used to construct the Yff Points is calledthe first Yff triangle. The Area of the triangle is
where
is the Circumradius of the original Triangle 
. The second Yff triangle isformed by connecting the Isotomic Conjugate Points of 
, 
, and 
.See also Yff Points
References
Yff, P. ``An Analog of the Brocard Points.'' Amer. Math. Monthly 70, 495-501, 1963.
- Re-Entrant Circuit
- Refinement
- Reflection
- Reflection Property
- Reflection Relation
- Reflexible
- Reflexible Map
- Reflexive Closure
- Reflexive Graph
- Reflexive Reduction
- Reflexive Relation
- Reflexivity
- Region
- Regression
- Regression Coefficient
- Regula Falsi
- Regular Function
- Regular Graph
- Regular Isotopy
- Regular Isotopy Invariant
- Regularity Theorem
- Regularized Beta Function
- Regularized Gamma Function
- Regular Local Ring
- Regular Number