The three dimensional coordinate system provides the three physical dimensions of space — height, width, and length.

The coordinates in a three dimensional system are of the form (x,y,z). As an example, two points are plotted in this system P(3,0,5) and Q(−5,−5,7). The axes are depicted in a world-coordinates orientation with the z-axis pointing up.

The x-, y-, and z-coordinates of a point can also be taken as the distances from the yz-plane, xz-plane, and xy-plane respectively.

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