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Do Two planes always intersect in a line?
Some planes are parallel and don't intersect at all. Those that do intersect (and that are not coincident, i.e. the same plane) intersect in a line.
If two coplanar lines do not intersect then they must be what?
Skew. * * * * * FALSE. In fact, if they are skew, they must intersect. They have to be parallel for them not to intersect.
What are lines that do not intersect called?
Lines that never intersect are parallel.
If two lines in the same plane and do not intersect they are called?
Coplanar lines that do not intersect are parallel. Non-coplanar lines that do not intersect are called skew lines.
What are perpedicular lines?
Perpendicular lines are like two strangers standing at a right angle to each other - they never meet and have nothing in common. They are a pair of lines that intersect at a 90-degree angle, creating a perfect L-shape. Think of them as the odd couple of geometry - they may not get along, but they sure know how to keep things interesting.
