Saturday, February 6, 2021

1646. Fermat Points-Equilateral Triangle

1 comment:

  1. "Triangle OaObOc is the reflection of Napoleon's triangle at X(5).", Angel Montesdeoca, 07.02.2021.

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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...