Saturday, November 28, 2020

1578.

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1 comment:

  1. Dr. Abdilkadir AltıntaşJanuary 18, 2021 at 1:39 AM

    ABC is perspective with A1B1C1 and A2B2C2. In both case perspector is X(4)-orthocenter of ABC.

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1989. A Circle Centered at X(5476)