Joseph Diez Gergonne Annales de Gergonne Soddy line GEOS circle Incircle and excircles Mittenpunkt Lemoine point 1771 in France Inclusion (logic) Nagel point Feuerbach hyperbola Orthocentroidal circle Vecten points Stephen Stigler Tangential triangle Equal detour point Jean-Victor Poncelet Duality (projective geometry) Jean Jacques Bret Jacques Frédéric Français The Secrets of Triangles Soddy circles of a triangle Isotomic conjugate Polynomial and rational function modeling Power center (geometry) Von Staudt conic Response surface methodology List of triangle topics List of geometers De Longchamps point Mabel Minerva Young Problem of Apollonius Polynomial regression Ludwig Immanuel Magnus Iso…

operimetric point Exsphere (polyhedra) John Rigby (mathematician) Optimal experimental design Malfatti circles François-Joseph Servois Pole and polar List of mathematics journals Nîmes Triangle center Operational calculus Miquel's theorem Steiner tree problem Pascal's theorem List of logicians Collinearity Émile Lemoine Pappus of Alexandria Heronian triangle Timeline of the history of the scientific method Cubic plane curve History of Grandi's series Special cases of Apollonius' problem Homothetic center History of logic Projective geometry Design of experiments June 19 May 4 History of statistics Conic section L

exell's theorem Barycentric coordinate system History of mathematical notation Encyclopedia of Triangle Centers Triangle Table of mathematical symbols by introduction date Timeline of manifolds