concave polygon

См. также в других словарях:

• concave polygon — noun a polygon such that there is a straight line that cuts it in four or more points • Ant: ↑convex polygon • Hypernyms: ↑polygon, ↑polygonal shape • Hyponyms: ↑reentrant polygon, ↑reentering polygon * * …   Useful english dictionary

• Polygon — For other uses, see Polygon (disambiguation). Some polygons of different kinds In geometry a polygon (   …   Wikipedia

• Concave — A concave set. The word concave means curving in or hollowed inward, as opposed to convex. The former may be used in reference to: Concave lens, a lens with inward curving (concave) surfaces. Concave polygon, a polygon which is not convex.… …   Wikipedia

• Concave function — In mathematics, a concave function is the negative of a convex function. A concave function is also synonymously called concave downwards, concave down, convex upwards, convex cap or upper convex. Contents 1 Definition 2 Properties 3 Examples …   Wikipedia

• Polygon mesh — A polygon mesh or unstructured grid is a collection of vertices, edges and faces that defines the shape of a polyhedral object in 3D computer graphics and solid modeling. The faces usually consist of triangles, quadrilaterals or other simple… …   Wikipedia

• polygon — polygonal /peuh lig euh nl/, adj. polygonally, adv. /pol ee gon /, n. a figure, esp. a closed plane figure, having three or more, usually straight, sides. See illus. under heptagon, hexagon, octagon, pentagon, quadrilateral, triangle …   Universalium

• concave — concavely, adv. concaveness, n. adj., v. /kon kayv , kon kayv/; n. /kon kayv/, adj., n., v., concaved, concaving. adj. 1. curved like a segment of the interior of a circle or hollow sphere; hollow and curved. Cf. convex (def. 1). 2. Ge …   Universalium

• concave — con•cave adj., v. [[t]kɒnˈkeɪv, ˈkɒn keɪv[/t]] n. [[t]ˈkɒn keɪv[/t]] adj. n. v. caved, cav•ing 1) math. curved or hollowed inward like the inside of a circle or sphere Compare convex 1) 2) math. (of a polygon) having at least one interior angle… …   From formal English to slang

• Convex and concave polygons — An example of a convex polygon: a regular pentagon In geometry, a polygon can be either convex or concave (non convex). Contents 1 Convex polygons …   Wikipedia

• Re-entrant polygon — A re entrant, or concave polygon is one in which at least one interior angle is more than 180 degrees (i.e. a reflex angle). A polygon is re entrant or concave if there exist two points within the polygon which cannot be connected by a straight… …   Wikipedia

• reentering polygon — noun a polygon with one or more reentrant angles • Syn: ↑reentrant polygon • Hypernyms: ↑concave polygon * * * a polygon having one or more reentering angles. * * * reentering polygon, a polygon having at least one reentering angle …   Useful english dictionary