Monday, March 22, 2021

1683. Orthologic Triangles

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Sunday, March 21, 2021

1682. A Common Property of X(99), X(110) and X(476)

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1681. Side Line Centers

 

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Thursday, March 18, 2021

1680. A Locus Property For K002-Thomson Cubic

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Wednesday, March 17, 2021

1679. A Construction For X(13443) = CENTER OF 1st DAO-APOLLONIUS CIRCLE.

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Saturday, March 13, 2021

1678. Ellipse of Symmedian Points

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Friday, March 12, 2021

1677.

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Thursday, March 11, 2021

1676. Congruent Circles

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Tuesday, March 9, 2021

1675. Trace of NPC centers (All references are welcome)

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Sunday, March 7, 2021

1674. A Fixed Perspector

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Saturday, March 6, 2021

1673. Euler to Euler

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Thursday, March 4, 2021

1672. Parabologic Triangles

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Monday, March 1, 2021

1671. Rectangle of Bevan 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...