concyclic+points

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• Concyclic points — In geometry, a set of points is said to be concyclic (or cocyclic) if they lie on a common circle. Concyclic points, showing that the perpendicular bisectors of pairs are concurrent …   Wikipedia

• concyclic — /keuhn suy klik, sik lik/, adj. Geom. (of a system of points) lying on the circumference of a circle. [1870 75; CON + CYCLIC] * * * …   Universalium

• Fermat point — In geometry, the first Fermat point, or simply the Fermat point, also called Torricelli point, is the solution to the problem of finding a point F inside a triangle ABC such that the total distance from the three vertices to point F is the… …   Wikipedia

• Émile Lemoine — Infobox Scientist name = Émile Michel Hyacinthe Lemoine image width = 250px caption = birth date = birth date|1840|11|22|fd=y birth place = Quimper, France residence = Paris, France nationality = French death date = death date and… …   Wikipedia

• Abouabdillah's theorem — refers to two distinct theorems in mathematics: one in geometry and one in number theory.GeometryIn geometry, similarities of an Euclidean space preserve circles and spheres. Conversely, Abouabdillah s theorem states that every injective or… …   Wikipedia

• List of mathematics articles (C) — NOTOC C C closed subgroup C minimal theory C normal subgroup C number C semiring C space C symmetry C* algebra C0 semigroup CA group Cabal (set theory) Cabibbo Kobayashi Maskawa matrix Cabinet projection Cable knot Cabri Geometry Cabtaxi number… …   Wikipedia

• Regular polygon — A regular polygon is a polygon which is equiangular (all angles are congruent) and equilateral (all sides have the same length). Regular polygons may be convex or star.General propertiesThese properties apply to both convex and star regular… …   Wikipedia

• List of circle topics — This list of circle topics includes things related to the geometric shape, either abstractly, as in idealizations studied by geometers, or concretely in physical space. It does not include metaphors like inner circle or circular reasoning in… …   Wikipedia

• Cross-ratio — D is the harmonic conjugate of C with respect to A and B In geometry, the cross ratio, also called double ratio and anharmonic ratio, is a special number associated with an ordered quadruple of collinear points, particularly points on a… …   Wikipedia

• Incidence (geometry) — In geometry, the relations of incidence are those such as lies on between points and lines (as in point P lies on line L ), and intersects (as in line L1 intersects line L2 , in three dimensional space). That is, they are the binary relations… …   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