Yff triangles

The first Yff triangle is the Cevian triangle Δ A' B' C' of the first Yff point. The area of the first Yff triangle is Δ = u^3/(2R), where R is the circumradius of the reference triangle. This is the same area as the second Yff triangle.

second Yff triangle | Yff central triangle | Yff contact triangle | Yff points