When two lines are parallel, then they do not intersect.
Skew lines are nonintersecting, nonparallel lines - in other words, lines that aren't part of the same plane.
The answer is four. Wish I could draw a picture.
If the planes are non-intersecting, then they're parallel. Any line that intersects one of them intersects both of them.
Two parallel lines.
yes, two lines can be coplanar.
Hey, this one is nice! I will venture the following: * 3: make them tangent in one point, with no intersection * 2: make them have a small intersection, ie. crossing in two points * 1: make them tangent from the inside * 0: make one fall completely within the other Giving the explanation would just be killing the imagination.
If they are set next to each other and never cross.Edit by Gamerkid26:_________________ Those two lines are parallel.// Those two lines are also parallel.So are those two.\\ And those two./\ These lines are NOT parallel.======================
For two dimensional lines: Get the formulas for the two lines into a format so that you can evaluate the slope. If the slopes are different, then they will intersect. If the slopes are the same, then you have two parallel lines, or possibly, the two equations describe the same line.
Two lines cross or intersect at a point.
Two lines that do not intersect on the same plane are Parallel lines.
Two lines intersect at a point
An ellipse has two lines of symmetry.