Midcircles and the arbelos - Eric Danneels and Floor van Lamoen We begin with a study of inversions mapping one given circle into another. The...
On triangles with vertices on the angle bisectors - Eric Danneels We study interesting properties of triangleswhose vertices are on the three...
A simple perspectivity - Eric Danneels We construct a simple perspectivity that is invariant under isotomic conjugation. [IMG]...
The Eppstein centers and the Kenmotu points - Eric Danneels The Kenmotu points of a triangle are triangle centers associated with squares each...
A simple construction of a triangle from its centroid, incenter, and a vertex - Eric Danneels We give a simple ruler and compass construction of...
A theorem on orthology centers - Eric Danneels and Nikolaos Dergiades We prove that if two triangles are orthologic, their orthology centers have...
The intouch triangle and the OI-line - Eric Danneels We prove some interesting results relating the intouch triangle and the OI line of a...
A simple construction of the congruent isoscelizers point - Eric Danneels We give a very simple construction of the congruent isoscelizers point...
