Wednesday, March 2, 2022

1805. An Equilateral Triangle Inscribed in Circumcircle

2 comments:

  1. Line BcCb is perpendicular bisector of BC.

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  2. let A1B1C1 be the CircumCevian triangle of X(15). A',B',C' are the antipodes of A1,B1,C1 on the circumcircle respectively

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1987. Circumcenter On Euler Line

 Let H=X(4)-Orthocenter of ABC. A 1 B 1 C 1 cevian triangle of H. B1 A , C1 A are reflections of B1, C1 on A. L A , line through B1 A , C1...