The Facts on File Geometry Handbook by Catherine A. Gorini

By Catherine A. Gorini

Like different components of arithmetic, geometry is a constantly growing to be and evolving box. pcs, expertise, and the sciences force many new discoveries in arithmetic. For geometry, the parts of quantum pcs, special effects, nanotechnology, crystallography, and theoretical physics were relatively proper some time past few years. there were enormous advancements within the box of geometry because the first version of "The proof On dossier Geometry Handbook" used to be released. an awesome primer for heart and highschool scholars almost about geometry, this revised version highlights new advancements whereas increasing at the fabric within the first variation. greater than three hundred new word list phrases were extra in addition to new biographies, occasions, charts, tables, theorems, and images and line illustrations. New and revised entries contain: Algebraic equation; Calipers; Coloring; Devil's pitchfork; Hausdorff distance; John Hubbard; Isometric viewpoint; Gottfried Wilhelm Leibniz; Magic sq.; colossal Moonshine insanity; Isaac Newton; Grigory Perelman; Root snail; tuition arithmetic examine team (SMSG); Sudoku sq.; Wheel of Theodorus; and, Windmill Theorem.

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Centigon See centesimal minute. central angle An angle formed by two radii of the same circle. central collineation See perspective collineation. central conic An ellipse or hyperbola; so called because they both have point symmetry. central dilation See dilation. central inversion See point symmetry. central line A trilinear line of the form lp + mq + nr = 0, where (l, m, n) is a triangle center. central projection The projection of a sphere from its center onto a tangent plane. central reflection See point symmetry.

Also called center of mass. center of inversion The center of a circle of inversion. center of perspectivity See perspective center. center of projection See perspective projection. centesimal angle See gon. centesimal minute A unit of angle measure; it is 1/100 of a gon. centesimal second A unit of angle measure; it is 1/100 of a centesimal minute. centigon See centesimal minute. central angle An angle formed by two radii of the same circle. central collineation See perspective collineation. central conic An ellipse or hyperbola; so called because they both have point symmetry.

Conchoid of Nicomedes A curve that can be used to trisect angles and duplicate the cube. It is the conchoid determined by a line and a point composite knot – conchoid of Nicomedes glossary 35 glossary concho spiral – congruence not on the line and is given by the equation (x2 + y2)(y – a)2 = k2 y2, where a and k are constants. concho spiral A helix lying on a cone with the property that the tangents to the concho spiral intersect the generators of the cone at a constant angle. conclusion (1) The statement at the end of a proof that tells what has been proved.

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