👉 Closeness is a concept in mathematics that refers to how closely two or more points are related or interconnected. It can be defined as the minimum distance between any pair of points within a specified region, such as a line segment, circle, rectangle, or sphere. In geometry and other branches of mathematics, closeness is often used to measure distances between objects or points in space. For example, two distinct points A and B are said to be "close" if there exists a line segment connecting