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Coordinate

Concept

Coordinate

A coordinate is the position of an object in a coordinate system, relative to the corresponding axis. In a two-dimensional coordinate system, points are usually expressed as a coordinate pair, also called ordered pair, which is denoted by (x,y).(x,y).
Point on the 2D coordinate plane
The first coordinate states the position along the x-x\text{-}axis and the second coordinate states the position along the y-y\text{-}axis. In a three-dimensional coordinate system, three numbers are needed to express a coordinate position. Each number tells the point's position in relation to one axis.
A coordinate point in three dimensions is also referred to as an ordered triple and denoted by (x,y,z).(x,y,z). The same reasoning applies for coordinate systems with more than three dimensions.