Date   
Isogonal conjugate wrt cevian and pedal triangles By Tran Quang Hung ·
NPC center lies on Euler line 3 messages By Tran Quang Hung ·
Forum geom 2 messages By rona levi ·
ABOUT MALFATTI CIRCLES By Minh Trịnh Xuân ·
MUTUAL Polar Conic 4 messages By kitaisky viktor ·
ABOUT ARBITRARY CIRCLES 4 messages By Minh Trịnh Xuân ·
ABOUT ARBITRARY CIRCLE By Minh Trịnh Xuân ·
Six Isodynamic Points on a Circle 2 messages By Kadir Altıntaş ·
Circles Passing through X(11)-Feuerbach Point of ABC By Kadir Altıntaş ·
The triangle center (S^2+SB SC)/(SA(3S^2+5 SB SC)) By Angel Montesdeoca ·
Euler line is OI line By Tran Quang Hung ·
Equilateral From Triangulation 3 messages By Kadir Altıntaş ·
A Computation for r2018 (http://www.xtec.cat/~qcastell/ttw/ttweng/resultats/r2018.html) 4 messages By Kadir Altıntaş ·
Antipedal triangle and Circumcevian triangle are perspective 4 messages By Vu Thanh Tung ·
ABOUT ARBITRARY CIRCLES 2 messages By Minh Trịnh Xuân ·
Circlecevian, Triangle Centers, Cyclologic, Perspective 12 messages By Vu Thanh Tung ·
Rquilateral Triangle from X(125)'s of Subtriangles By Kadir Altıntaş ·
An instance of the nine point circle as radical circle, or and appearance of X3613. 2 messages By Francisco Javier García Capitán ·
Parabola locus of centres of hyperbolas 2 messages By Angel Montesdeoca ·
Perspective and Parallelogic By Vu Thanh Tung ·