Any set of points that lie on the same plane are said to be coplanar.
In this illustration, A,B,C, and D are coplanar, as they are all on the same plane. By contrast, E is not on the same plane as the other points, so it is not coplanar with them.
Since a plane can be defined by any three points, E is still coplanar with other pairs of points. Therefore, there are seven sets of coplanar points on the graph.
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