Common point(s) shared by two lines in Euclidean geometry
Line
In Euclidean geometry, the intersection of a line and a line can be the empty set, a single point, or a line.
Distinguishing these cases and finding the intersection have uses, for example, in computer graphics, motion planning, and collision detection.
Text adapted from Wikipedia, CC BY-SA 4.0. Photograph: Steffen Schmitz (see Commons), Wikimedia Commons.