A line
A line is a straight, one-dimensional figure that extends infinitely in both directions. It has no thickness and is defined by two points, which are often labeled as A and B. In geometry, lines are fundamental elements used to create shapes and angles.
Lines can be represented in various ways, such as through equations in a coordinate system. For example, the equation of a line in a two-dimensional space can be expressed in slope-intercept form as y = mx + b, where m represents the slope and b is the y-intercept. Lines are essential in mathematics, art, and design.