Plane Space was created in 2002.
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The plane is in two dimensional and the space figure is in three dimensional.
Plane
X-Plane Airliner was created in 2010-02.
You do not have 3 coordinates in the Cartesian plane. The Cartesian plane is a plane and is therefore 2 dimensional. In 2 dimensional space you require only 2 coordinates. 3 coordinates are required to locate a point in 3-dimensional space but then it cannot be a Cartesian PLANE.
the plane, or xy plane, has two dimensions space has 3 dimensions