Chromogeometry brings together planar Euclidean geometry, here called blue geometry, and two relativistic geometries, called red and green. We show that if a triangle has four blue Incenters and four red Incenters, then these eight points lie on a green circle, whose center is the green Orthocenter of the triangle, and similarly for the other colours. Tangents to the incenter circles yield interesting additional standard quadrangles and concurrencies. The proofs use the framework of rational trigonometry together with standard coordinates for triangle geometry, while a dilation argument allows us to extend the results also to Nagel and Speiker points.Kromogeometrija povezuje ravninsku euklidsku geometriju, ovdje zvanu plavom geometrijom, te...
In this paper we show how to use computers to discover appearence of cyclic quadrangles in geometri...
During a course in Euclidean geometry at high school level, a student encounters four classical tri...
We initiate a triangle geometry in the projective metrical setting, based on the purely algebraic ap...
Chromogeometry brings together planar Euclidean geometry, here called blue geometry, and two relativ...
We develop a generalized triangle geometry, using an arbitrary bilinear form in an affine plane over a...
We develop a generalized triangle geometry, using an arbitrary bilinear form in an affine plane over...
This paper shows how a recent reformulation of the basics of classical geometry and trigonometry rev...
We look at the four-fold symmetry given by the Incenter quadrangle of a triangle, and the relation w...
We study relations between the eight projective quadrangle centroids of a quadrangle in universal hy...
We initiate a triangle geometry in the projective metrical setting, based on the purely algebraic ap...
It is shown in the paper the discovery of two remarkable points of the triangle by means of “THE GEO...
Knowledge about Plane Geometry and TrianglesThe circumcircle of a triangle is the unique circle dete...
We have another look at the Feuerbach theorem with a view to extending it in an oriented way to fini...
Podsjećamo na konstrukcije temeljene na trijadama konika sa žarištima u parovima vrhova referetnog t...
This paper shows how a recent reformulation of the basics of classical geom-etry and trigonometry re...
In this paper we show how to use computers to discover appearence of cyclic quadrangles in geometri...
During a course in Euclidean geometry at high school level, a student encounters four classical tri...
We initiate a triangle geometry in the projective metrical setting, based on the purely algebraic ap...
Chromogeometry brings together planar Euclidean geometry, here called blue geometry, and two relativ...
We develop a generalized triangle geometry, using an arbitrary bilinear form in an affine plane over a...
We develop a generalized triangle geometry, using an arbitrary bilinear form in an affine plane over...
This paper shows how a recent reformulation of the basics of classical geometry and trigonometry rev...
We look at the four-fold symmetry given by the Incenter quadrangle of a triangle, and the relation w...
We study relations between the eight projective quadrangle centroids of a quadrangle in universal hy...
We initiate a triangle geometry in the projective metrical setting, based on the purely algebraic ap...
It is shown in the paper the discovery of two remarkable points of the triangle by means of “THE GEO...
Knowledge about Plane Geometry and TrianglesThe circumcircle of a triangle is the unique circle dete...
We have another look at the Feuerbach theorem with a view to extending it in an oriented way to fini...
Podsjećamo na konstrukcije temeljene na trijadama konika sa žarištima u parovima vrhova referetnog t...
This paper shows how a recent reformulation of the basics of classical geom-etry and trigonometry re...
In this paper we show how to use computers to discover appearence of cyclic quadrangles in geometri...
During a course in Euclidean geometry at high school level, a student encounters four classical tri...
We initiate a triangle geometry in the projective metrical setting, based on the purely algebraic ap...