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• Sharygin Olympiads, the best
  ...<math>I'_B, I'_C</math> are defined similarly. Prove that the lines <math>HI'_A, H'I'_B, H''I'_C</math> concur. We will prove that <math>I \in HI'_A.</math>
  29 KB (4,997 words) - 18:06, 16 May 2024