Line properties refer to the characteristics that define how lines behave in geometry. These properties include concepts such as length, slope, and direction. A line is typically straight and extends infinitely in both directions, and it can be described using equations in a coordinate system. Another important aspect of line properties is the relationship between different lines. For example, lines can be parallel, meaning they never intersect, or perpendicular, meaning they intersect at a right angle. Understanding these properties is essential in fields like mathematics, engineering, and art.