Noncoplanar points are points that do not lie on the same plane. If you have two rectangles joined together at points CD, then the rectangle at points ABCD have coplanar points but
http://wiki.answers.com/Q/What_are_noncoplanar_poi...

POSTULATE: A line contains at least 2 pts; a plane contains at least 3 noncollinear
http://www.chacha.com/question/whatarefournonco...

leave any 1 of the points out, the other 3 will be coplanar, and there are 4 ways to do that, so the answer is 4.
http://answers.yahoo.com/question/index?qid=200909...

Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them
https://yedda.com/questions/geometry_2732217844148...
