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Isotomic conjugate — In geometry, the isotomic conjugate of a point P not on a sideline of triangle ABC is constructed as follows: Let A , B , C be the points in which the lines AP , BP , CP meet the lines BC , CA , AB , respectively. Reflect A B C in the midpoints… … Wikipedia
List of mathematics articles (I) — NOTOC Ia IA automorphism ICER Icosagon Icosahedral 120 cell Icosahedral prism Icosahedral symmetry Icosahedron Icosian Calculus Icosian game Icosidodecadodecahedron Icosidodecahedron Icositetrachoric honeycomb Icositruncated dodecadodecahedron… … Wikipedia
List of triangle topics — This list of triangle topics includes things related to the geometric shape, either abstractly, as in idealizations studied by geometers, or in triangular arrays such as Pascal s triangle or triangular matrices, or concretely in physical space.… … Wikipedia
Incircle and excircles of a triangle — A triangle (black) with incircle (blue), incentre (I), excircles (orange), excentres (JA,JB,JC), internal angle bisectors (red) and external angle bisectors (green) In geometry, the incircle or inscribed circle of a triangle is the largest circle … Wikipedia
Isogonal conjugate — Isogonal coniugate of P . Isogonal coniugate transformation over the points inside the triangle.In geometry, the isogonal conjugate of a point P with respect to a triangle ABC is constructed by reflecting the lines PA , PB , and PC about the… … Wikipedia
Brocard points — are special points within a triangle. They are named after Henri Brocard (1845 ndash; 1922), a French mathematician. DefinitionIn a triangle ABC with sides a , b , and c , where the vertices are labeled A , B and C in counterclockwise order,… … Wikipedia
Nagel point — The Nagel point (blue, N) of a triangle (black). The red triangle is the extouch triangle, and the orange circles are the excircles In geometry, the Nagel point is a point associated with any triangle. Given a triangle ABC, let TA, TB, and TC be… … Wikipedia
