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Distance::between    ''x''::''y''    Point::space    ''A''::points    ''B''::distance    Right::''d''

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Distance is a numerical description of how far apart objects are. In physics or everyday usage, distance may refer to a physical length, or an estimation based on other criteria (e.g. "two counties over"). In mathematics, a distance function or metric is a generalization of the concept of physical distance. A metric is a function that behaves according to a specific set of rules, and is a concrete way of describing what it means for elements of some space to be "close to" or "far away from" each other. In most cases, "distance from A to B" is interchangeable with "distance between B and A".


Distance sections
Intro  Mathematics   Distance versus directed distance and displacement   Other \"distances\"  See also  References  

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