In Euclidean Geometry:
they never intersect
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they look like this thay go on and never touch.
In Non-Euclidean Geometry:
Naren BITS 18:36, 7 Jan 2009 (UTC)Naren BITS 18:36, 7 Jan 2009 (UTC)Naren BITS 18:36, 7 Jan 2009 (UTC)Naren BITS 18:36, 7 Jan 2009 (UTC)Naren BITS 18:36, 7 Jan 2009 (UTC)
They never intersect according to Euclid. But if u consider non-euclidean geometry, they do. (when the surfaces are uneven).
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Perpendicular lines always intersect and make 90 degree angles. Parallel lines never intersect with each other.
Yes, that's what makes them parallel lines - they have the same slope. So they never will intersect with each other. If a set of lines didn't have the same slope, at some point they would intersect and thus would not be parallel.
They are parallel lines
Parallel lines
Skew lines