Saturday, January 23, 2021

1636. Neuberg to Neuberg

1 comment:

  1. Some pairs (P,Q)=(X_i,X_j): {(1,484), (3,1157), (4,30), (15,16), (74,399)}

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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...