Most visitors to this site keep a pretty close watch on their system. When a new user account suddenly appears on the system it's no surprise it's a matter of concern and raises more than a few questions. It turns out UpdatusUser is part of the NVIDIA driver package for their graphics cards.
Coplanar Lines. Coplanar Lines are lines which lie on the same plane. Two parallel lines or two intersecting lines always lie in a plane. Thus, two line are coplanar, if and only if they are either parallel or intersecting. Lines in three dimensional space are coplanar, only if they are not skewed lines. Two lines which are neither parallel nor intersecting are called skewed lines.
Given two parallel lines and a transversal, alternate interior angles are congruent. The key here is that you are told the two lines are parallel, and you have learned that the relationships between the angles created by the intersection of the transversal line and the two parallel lines. All of the above are true based on the two lines being parallel with a transversal line intersecting.