Orthopoles and Variable Flanks - Floor van Lamoen LTTK TEZ xin giới thiệu với bạn đọc yêu thích tạp chí Hình học Geometricorum một bài viết cực...
A special point in the arbelos leading to a pair of Archimedean circles - Floor van Lamoen In 2011 Quang Tuan Bui found a beautiful and simple...
Jigsawing a quadrangle from a triangle - Floor van Lamoen For an acute-angled triangle ABC, we construct two isotomic points P and Q on BC and P'...
The spheres tangent externally to the tritangent spheres of a triangle - Floor van Lamoen We consider the tritangent circles of a triangle as the...
A spatial view of the second Lemoine circle - Floor van Lamoen We consider circles in the plane as orthogonal projections of spheres in three...
Construction of Malfatti squares - Floor van Lamoen and Paul Yiu We give a very simple construction of the Malfatti squares of a triangle, and...
Some more Powerian pairs in the arbelos - Floor van Lamoen Frank Power has presented two pairs of Archimedean circles in the arbelos. In each...
Midcircles and the arbelos - Eric Danneels and Floor van Lamoen We begin with a study of inversions mapping one given circle into another. The...
Square wreaths around hexagons - Floor van Lamoen We investigate the figures that arise when squares are attached to a triple of non-adjacent...
Archimedean adventures - Floor van Lamoen We explore the arbelos to find more Archimedean circles and several infinite families of Archimedean...
Triangle-conic porism - Aad Goddijn and Floor van Lamoen We investigate, for a given triangle, inscribed triangles whose sides are tangent to a...
A projective generalization of the Droz-Farny line theorem - Jean-Pierre Ehrmann and Floor van Lamoen LTTK TEZ xin giới thiệu với bạn đọc yêu...
Inscribed squares - Floor van Lamoen We give simple constructions of various squares inscribed in a triangle, and some relations among these...
Circumrhombi - Floor van Lamoen We consider rhombi circumscribing a given triangle ABC in the sense that one vertex of the rhombus coincides with...
The parasix configuration and orthocorrespondence - Bernard Gibert and Floor van Lamoen We introduce the parasix configuration, which consists of...
Rectangles attached to the sides of a triangle - Nikolaos Dergiades and Floor van Lamoen We study the figure of a triangle with a rectangle...
Napoleon triangles and Kiepert perspectors - Floor van Lamoen In this paper we prove generalizations of the well known Napoleon Theorem and...
Some similarities associated with pedals - Jean-Pierre Ehrmann and Floor van Lamoen LTTK TEZ xin giới thiệu với bạn đọc yêu thích tạp chí Hình...
The Stammler circles - Jean-Pierre Ehrmann and Floor van Lamoen We investigate circles intercepting chords of specified lengths on the sidelines...
Equilateral chordal triangles - Floor van Lamoen When a circle intersects each of the sidelines of a triangle in two points, we can pair the...
