Four non-coplanar planes define a space.
A line contains at least two points, and a plane contains at least three non-collinear points. Space contains at least four noncoplanar planes (points). The points or lines that lie on the same plane are called coplanar planes and hence the points that do not lie on the same plane are called non-coplanar planes. Any four points lie in at least one space, and any four non-coplanar points lie in exactly one space. If two distinct spaces intersect, then their intersection is a plane. if P is any point of one set and Q is any point in the other set, then the segment P-Q intersects the line. As seen in the figure, the space at least four noncoplanar planes distinguish a space.
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