Saturday, January 30, 2021

1640. Conic Problem

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Wednesday, January 27, 2021

1639. Concyclic Points

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Sunday, January 24, 2021

1638. Conic Problem

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Saturday, January 23, 2021

1637.

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1636. Neuberg to Neuberg

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Wednesday, January 20, 2021

1635.

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Saturday, January 16, 2021

1634.

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Friday, January 15, 2021

1633.

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Thursday, January 14, 2021

1632.

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1631.

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Tuesday, January 12, 2021

1630.

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1629.

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Monday, January 11, 2021

1628.

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Sunday, January 10, 2021

1627. Extension of 1618

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1626. 1 st Isodynamic Point, Simson Lines, Equilateral Triangle, Euler Line

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Friday, January 8, 2021

1625. A Circle Through Feuerbach Point

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Wednesday, January 6, 2021

1624. Pedal-Cevian Side Perspector

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1623. A Property of K004-Darboux Cubic

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Tuesday, January 5, 2021

1622. Concurrence On the Circumcircle and Equilateral Triangle

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Sunday, January 3, 2021

1621. Conic of Conics

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1988. Circumcenters On Euler Line

  Let ABC be a triangle with P, Q are two points on Euler line of ABC. A',B',C' are inverse images of A,B,C through circle diame...