It is a tranversal.
Alternate Interior Angles
Coplanar lines are 2 or more lines located on the same plane. Ex.: If you draw 2 or more lines on a graph, they are all coplanar (the plane they are all on is the piece of paper you drew the graph on).
...must be coplanar.
Yes. Although, they could be coincident which may not be covered by either of these descriptions.
If there are no common points but both lines lie n the same plane they are considered "coplanar points"
Things in the same plane are coplanar.
Points and lines on the same plane are coplanar.
Coplanar lines that do not intersect are called parallel lines.
transversal
Non-coplanar lines refer to points operating or showing in different planes. None of the points are in the same plane.
Not sure about complanar. Coplanar lines can be collinear but need not be.
Two coplanar lines that never intersect are called called parallel lines.
Non-coplanar, by a strange coincidence!
Coplanar lines that do not intersect are parallel. Non-coplanar lines that do not intersect are called skew lines.
They are lines or points that lie on the same plane. Remember 3 or more points are collinear if they lie on the same line. IF those lines lie on the same plane they are coplanar.
-- They can be parallel, with no points in common, or -- They can intersect in exactly one point.