Corollary 2 (Schaal). If for three

Corollary 2 (Schaal). If for three points A′, B′, C′ the directed angles x =
(A′B, A′C), y = (B′C, B′A) and z = (C′A, C′B) satisfy x+y+z  0 mod ,
then the circumcircles of triangles A′BC, B′CA, C′AB are concurrent at P.
A simple barycentric coordinates formula

ผลลัพธ์ (อังกฤษ) 2:

Corollary 2 (Schaal). If for Three points A ', B', C 'directed the Angles x =
(A'B, A'C), Y = (B'C, B'A) and Z = (C'A, C'B). satisfy x + y + z? 0 mod?,
then the circumcircles of triangles A'BC, B'CA, C'AB are concurrent at P.
A Simple Formula barycentric Coordinates.