Tuesday, June 29, 2021

1732. An Equilateral Triangle

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Monday, June 28, 2021

1731. Collinear Points

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1730. A Construction For X(34155)

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Saturday, June 26, 2021

1729. Isogonal-Parallel Circle of P

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1728. Circlecevian Chain and Con-conic Orthocenters

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1727. Circlecevian Chain and Collinear Steiner Points

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1726. Circlevevian Chain and Collinear Fermat Points

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1725. Circlecevian Chain and Collinear Isodynamic Points

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1724. Circlecevian Chain and Collinear Centroids

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Sunday, June 20, 2021

1723. Tangent Circles and X(5238)

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Thursday, June 17, 2021

1722. Collinear Points

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Sunday, June 13, 2021

1721. A Property Of Isogonal Conjugates

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Saturday, June 12, 2021

1720. Collinear Circumcenters

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Friday, June 11, 2021

1719. Fourteen Points Circle

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Thursday, June 10, 2021

1718. Centroids On Euler Line

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1717. A Symmedian Point On Euler Line

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Sunday, June 6, 2021

1716. PRS-Neuberg Point


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Saturday, June 5, 2021

1715. A Conic On Neuberg Cubic

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Friday, June 4, 2021

1714. Collinear Points Related to K001-Neuberg Cubic

 

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1713. Concyclic 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...