In mathematics and geometry, a line is a fundamental geometric concept representing a one-dimensional, straight path that extends infinitely in both directions.
It is characterized by its defining property of having no endpoints and can be uniquely determined by two distinct points.
Lines serve as building blocks for understanding shapes, angles, and equations, forming the foundation of geometry and algebra. They are crucial tools for modeling real-world phenomena, enabling precise mathematical descriptions of everything from the trajectory of objects in physics to the relationships between variables in equations, making them a fundamental concept in various fields of study, including physics, engineering, and computer science.