Why Do Parallel Lines Never Intersect?

Parallel & Intersecting lines

Intersecting lines
In Euclidean geometry, the intersection of a line and a line can be the empty set, a point, or a line. Distinguishing these cases and finding the intersection point have use, for example, in computer graphics, motion planning, and collision detection.
› wiki › Line–line_intersection
Two lines in the same plane will always intersect unless they are parallel. Parallel lines are lines that are always the same distance apart and they never intersect. ... The rails on a railroad track are always the same distance apart,they run in the same direction, and they never intersect.

Do parallel lines never cross?

Parallel lines are lines in a plane that are always the same distance apart. Parallel lines never intersect.

Why do parallel lines intersect?

The point at which the parallel lines intersect depends only on the slope of the lines, not at all on their y-intercept. In the affine plane, a line extends in two opposite directions. In the projective plane, the two opposite directions of a line meet each other at a point on the line at infinity.

Sophia Al-Mansoor

Sophia Al-Mansoor

Global Business & E-Commerce Reporter

Sophia analyzes international trade, startup ecosystems, retail transformation, and supply chain logistics for modern digital publications.