Which of the following is the more precise definition of perpendicular lines?
1. Two lines that intersect in a plane.
2. Two lines that intersect at right angles.
3.Two lines that go in opposite directions.
4. Two lines that never cross.

Question

Which of the following is the more precise definition of perpendicular lines? 
1. Two lines that intersect in a plane.
2. Two lines that intersect at right angles. 
3.Two lines that go in opposite directions. 
4. Two lines that never cross.

Champion · Answer

can lines that never cross be perpendicular?  and lines have no end, so they cannot go,in opposite directions.

Champion · Answer

lines can intersect in a plane at any angle you choose.  what is special about perpendicular lines?