Milorad Stevanović, Two triangle centers
associated with the excircles,
Forum Geometricorum 3 (2003) 197--203.
Abstract: The triangle formed by the second
intersections of the bisectors of a triangle and the respective excircles
is perspective to each of the medial and intouch triangles. We identify the
perspectors. In the former case, the perspector is closely related to the
Yff center of congruence.
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