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Distance is a fundamental concept in mathematics, physics, and everyday life, referring to the extent of separation between two points or objects. It is typically measured in units such as meters, kilometers, miles, or other relevant scales. In mathematics, distance can be defined in various contexts, including Euclidean distance in geometry, Hamming distance in information theory, and Manhattan distance in urban planning. In physics, distance is a scalar quantity that describes the separation between two points in space, often calculated using the Pythagorean theorem in two or three dimensions. In everyday usage, distance can refer to the physical space between two locations, the time required to travel between them, or the degree of separation between two entities. Understanding distance is crucial for navigation, engineering, and various scientific disciplines.