Q: Can two parallel lines ever become perpendicular?

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Only if they add up to 180 degrees which would be the case if the parallel lines are cut through by a perpendicular line.

Perpendicular perpendicilar Parallel means that they are next to each other without ever intersecting. Perpendicular is two lines that intersect at a 90 degree angle, like the corner of a room or the uppercase L.

Parallel lines never ever meet with each other

if they are parallel -- no. if not parallel -- yes

Parallel lines are lines which share the same gradient. In Euclidean geometry (the geometry used in standard mathematics and day-to-day physics), parallel lines will never meet at a point, but will share every point along their (infinite) lengths if 1 point is observed to coincide with both. The parallel postulate, which is a geometric axiom of Euclid's geometry, defines these properties. However, by moving into elliptical and hyperbolic geometries, parallel lines can be allow to intersect at points (where parallel lines are defined as 2 lines having the same gradient), whilst still retaining logically consistent geometrical definitions. Parallel lines are the opposite of perpendicular lines which meet at right angles.

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Perpendicular lines intersect at a 90 degree angle. Parallel lines do not intersect, nor would they ever intersect if continued infinitely.

Perpendicular lines intersect each other at 90 degrees but parallel lines never touch each other

By definition, perpendicular lines are those which meet in a right angle. So, yes, they have to meet in order to be "perpendicular". Parallel lines may, or may not, meet, depending on how you choose your axioms. In Euclidean geometry, parallel lines never meet. In certain types of non-Euclidean geometry, they can meet.

no because Perpendicular is a 90 degree angle and 90 degrees have no slant or anything they will always be parallel

Only if they add up to 180 degrees which would be the case if the parallel lines are cut through by a perpendicular line.

It means a line that intersects with another line. Where as parallel would be a lines that do not intersect, ever.

Perpendicular perpendicilar Parallel means that they are next to each other without ever intersecting. Perpendicular is two lines that intersect at a 90 degree angle, like the corner of a room or the uppercase L.

Parallel lines never ever meet with each other

No, parallel lines cannot ever intersect. The have identical slopes. Therefore, they will always remain parallel.

Yes.

if they are parallel -- no. if not parallel -- yes

Yes but parallel lines wont ever touch.