1990. Concurrent Circles

1957. Concurrent Circles On Circumcircle

1953. Concurrent Circles

1913. Concurrent Nine Point Circles

1893. A Construction For X(10409) = COLLINGS TRANSFORM OF X(623).

1858. A Construction For X(1319)-Bevan-Schröder Point

1853. A Construction For X(5497) = 5th HATZIPOLAKIS-MONTESDEOCA POINT

 Let I=X(1) incenter of ABC. Circle BIC ıntersects the AC and AB at Ab, Ac. Define Ba,Bc, Ca,Cb cyclically.

Inversion of the line BC in the circle (IBcCb) is a cirlcle GammaA. Define GammB, GammaC cyclically.

*  GammaA, GammB, GammaC are concurrent circles. Concurrency point is X(5497) =  5th HATZIPOLAKIS-MONTESDEOCA POINT.

1848. Concurrent Circles

1801. A Construction For Parry Point

1722. Collinear Points

1710. Concurrent Circles

1698. Concurrent Circles and X(502)

1644. Concurrent Circles, Bicentric Pairs?

1642.

1622. Concurrence On the Circumcircle and Equilateral Triangle