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In geometry, a triangle center or triangle centre is a point in the triangle's plane that is in some sense in the middle of the triangle. For example, the centroid , circumcenter , incenter and orthocenter were familiar to the ancient Greeks , and can be obtained by simple constructions .
In geometry, a centre (British English) or center (American English) (from Ancient Greek κέντρον (kéntron) 'pointy object') of an object is a point in some sense in the middle of the object. According to the specific definition of centre taken into consideration, an object might have no centre.
Center (gridiron football), a position in American and Canadian football; Centre (Australian rules football), a position on the Centre line; Center (basketball), a position; Centre (ice hockey), a position; Centre (rugby league), a position; Centre (rugby union), a position; Center fielder, often called "center", a position in baseball
The term is peculiar to the English language; French, for instance, uses "centre de gravité" on most occasions, and other languages use terms of similar meaning. [citation needed] The center of gravity, as the name indicates, is a notion that arose in mechanics, most likely in connection with building activities.
Some placenames in the United States use Centre in their names. Examples include the villages of Newton Centre and Rockville Centre, the city of Centreville, Centre County and Centre College. Sometimes, these places were named before spelling changes but more often the spelling serves as an affectation.
center Or centre. The four squares in the middle of the board. [72] See also expanded center. Sometimes short for pawn center. A king "in the center" can refer to an uncastled king on a center file. center file Or centre file. The king's file (e-file) or queen's file (d-file). center pawn Or centre pawn.
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The center of mass of a body with an axis of symmetry and constant density must lie on this axis. Thus, the center of mass of a circular cylinder of constant density has its center of mass on the axis of the cylinder. In the same way, the center of mass of a spherically symmetric body of constant density is at the center of the sphere.