| − | '''Coplanar''' means things that lie in one plane. [[Coplanar Points]] are contained in one plane. Coplanar lines are lines that are in one plane. Skew lines are lines that are not coplanar; these lines cannot be [[parallel]]. | + | '''Coplanar''' means lying in the same [[plane]]. [[Coplanar points]] are contained in one plane. Coplanar lines are lines that are in one plane. A set of up to three points must always be coplanar: the minimum number of points that can lie in different planes is four. |