Coordinates
Coordinates in a plane are the two items in an ordered pair, used to identify a location on a map or in a coordinate plane. These coordinates are relative to a fixed point or origin. In a geometry context, coordinates refer to points in a coordinate plane.
Example
The coordinates of the point on the coordinate plane shown below are 6 and 4.
The first coordinate, 6 is the xcoordinate, or the coordinate on the horizontal (x) axis while the second coordinate, 4, is the ycoordinate, or the coordinate on the vertical (y) axis.
Did you know?
Coordinates are also used in maps. Often, maps will use a letter as one of the coordinates for locating a point, and will use a numeral for the other point. Coordinates for the map below include:
Dublin, Ireland: C 2
London, England: D 3
Paris, France: E 4

See also coordinate plane, origin.