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Yff Center of Congruence

Let three Isoscelizers, one for each side, be constructed on a Triangle such that the four interior triangles they determine are congruent. Now parallel-displace these Isoscelizers until they concur in a single point. This point is called the Yff center of congruence and has Triangle Center Function

\alpha=\sec({\textstyle{1\over 2}}A).

See also Congruent Isoscelizers Point, Isoscelizer


Kimberling, C. ``Yff Center of Congruence.''

© 1996-9 Eric W. Weisstein