tangency
121Circumconic and inconic — In triangle geometry, a circumconic is a conic section that passes through three given points, and an inconic is a conic section inscribed in the triangle whose vertices lie at three given points. Suppose A,B,C are distinct points, and let ΔABC… …
122Focal surface — For a surface in three dimension the focal surface, surface of centers or evolute is formed by taking the centers of the curvature spheres, which are the tangential spheres whose radii are the reciprocals of one of the principal curvatures at the …
123Solder form — In mathematics, more precisely in differential geometry, a soldering (or sometimes solder form) of a fibre bundle to a smooth manifold is a manner of attaching the fibres to the manifold in such a way that they can be regarded as tangent.… …
124Visual Calculus — by Mamikon Mnatsakanian is an approach to solving a variety of integral calculus problems. [ [http://www.cco.caltech.edu/ mamikon/calculus.html Visual Calculus] Mamikon Mnatsakanian] Many problems which would otherwise seem quite difficult yield… …
125Pitch point — The pitch point is the point of tangency of two pitch circles (or of a pitch circle and pitch line) and is on the line of centers.1 Notes 1. ANSI/AGMA 1012 G05 , Gear Nomenclature, Definition of Terms with Symbols …
126Softimage 3D — Infobox Software name = Softimage3D caption = Screenshot of Softimage3D 3.9.2 developer = Softimage, Co. latest release version = 4.0 latest release date = August 2001 operating system = Windows, IRIX genre = 3D computer graphics license =… …
127Casey's theorem — In mathematics, Casey s theorem, also known as the generalized Ptolemy s theorem, is a theorem in Euclidean geometry named after the Irish mathematician John Casey. Formulation of the theorem Let ,O be a circle of radius ,R. Let ,O 1, O 2, O 3, O …
128Mandart inellipse — In geometry, the Mandart inellipse of a triangle is the inconic having parameters where a, b, and c are sides of the triangle. It is named after H. Mandart, who studied it in two papers published in the late 19th century.[1][2] The center of the… …
