Tuesday, April 27, 2021

1692. Symmedian Point on Euler Line

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Sunday, April 25, 2021

1691. Euler to Euler

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Friday, April 23, 2021

1690. An Inspiration of Mehmet Şahin's Problem

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Thursday, April 22, 2021

1689. Similar Triangles

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Sunday, April 18, 2021

1688. A Property of Jerabek Hyperbola

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1687. A Property of Kiepert Hyperbola

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Sunday, April 11, 2021

1686. A Property of OI line

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Thursday, April 8, 2021

1685. Sinorthiac Triangles

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1684. P-Cevian Orthiac Triangle of Isodynamic Points

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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...