Parallel lines are ALWAYS coplanar.
Two lines that are not coplaner exist on two different planes. These lines do not and will not intersect by simple definition. It is however, when speaking of three or more lines, when the possibility that two or more of them may intersect.
Coplaner surfaces are two or more surfaces that are in the same plane.
Two pairs
Transversal
How very interesting. And the question is ... ? Every line will intersect an infinite number of coplanar lines - not just "two or more".
they are two or more forces on the same plane
No, not always. Skew lines are never coplanar, but parallel lines are.
If two different lines intersect, they will always intersect at one point.
always. if two lines intersect, then exactly one plane contains the lines.
They are a pair of vectors which are not parallel but whose lines of action cannot meet.
no