A generalization of the Lemoine point - Charles Thas It is known that the Lemoine point K of a triangle in the Euclidean plane is the point 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...
The M-configuration of a triangle - Alexei Myakishev We give an easy construction of points A_a, B_a, C_a on the sides of a triangle ABC such...
Isotomic inscribed triangles and their residuals - Mario Dalcín We prove some interesting results on inscribed triangles which are isotomic. For...
Harcourt's theorem - Nikolaos Dergiades and Juan Carlos Salazar We give a proof of Harcourt's theorem that if the signed distances from the...
A note on the Schiffler point - Lev Emelyanov and Tatiana Emelyanova LTTK TEZ xin giới thiệu với bạn đọc yêu thích tạp chí Hình học Geometricorum...
On the Kosnita point and the reflection triangle - Darij Grinberg The Kosnita point of a triangle is the isogonal conjugate of the nine-point...
Similar pedal and cevian triangles - Jean-Pierre Ehrmann The only point with similar pedal and cevian triangles, other than the orthocenter, is...
The Lucas circles and the Descartes formula - Wilfred Reyes We determine the radii of the three circles each tangent to the circumcircle of a...
Triangle centers associated with the Malfatti circles - Milorad Stevanovic Various formulae for the radii of the Malfatti circles of a triangle...
On the Fermat lines - Paul Yiu We study the triangle formed by three points each on a Fermat line of a given triangle, and at equal distances...
Napoleon triangles and Kiepert perspectors - Floor van Lamoen In this paper we prove generalizations of the well known Napoleon Theorem and...
On the circumcenters of cevasix configurations - Alexei Myakishev and Peter Woo We strengthen Floor van Lamoen's theorem that the 6 circumcenters...
Some configurations of triangle centers - Lawrence Evans Many collections of triangle centers and symmetrically defined triangle points are...
Bicentric pairs of points and related triangle centers - Clark Kimberling Bicentric pairs of points in the plane of triangle ABC occur in...
On the procircumcenter and related points - Alexei Myakishev Given a triangle ABC, we solve the construction problem of a point P, together with...
Orthocorrespondence and orthopivotal cubics - Bernard Gibert We define and study a transformation in the triangle plane called the...
An Application of Thébault's Theorem - Wilfred Reyes LTTK TEZ xin giới thiệu với bạn đọc yêu thích tạp chí Hình học Geometricorum một bài viết...
The Apollonius circle as a Tucker circle - Darij Grinberg and Paul Yiu LTTK TEZ xin giới thiệu với bạn đọc yêu thích tạp chí Hình học...
Brahmagupta quadrilaterals - K. R. S. Sastry The Indian mathematician Brahmagupta made valuable contributions to mathematics and astronomy. He...
