A ray is a fundamental geometric concept in mathematics. It consists of a single point called the endpoint and extends infinitely in one direction.
Rays are typically represented with an arrow to indicate the direction of their extension. Rays are used to describe lines, angles, and vectors in geometry and trigonometry.
They are a foundational element for understanding how lines and line segments behave in various mathematical and physical contexts, helping to model and solve problems involving direction, position, and orientation.