Sunday, June 13, 2021

1721. A Property Of Isogonal Conjugates

2 comments:

  1. https://artofproblemsolving.com/community/u426945h2589766p22339087

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  2. 劉志宏
    A1,A1* and A2,A2* are isogonal conjugates. Circles AA1A2* and AA2A1* concur in a point on circle ABC.

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