Euclidean Distance

Euclidean distance measures the straight-line length between two points in space, like how a ruler would measure the shortest distance between them. Imagine plotting two points on a graph; the Euclidean distance is found by drawing a direct line connecting these points and calculating how long that line is. It’s used in many fields, such as in geography to determine the distance between two cities or in machine learning to assess how similar or different data points are. Essentially, it’s a way of quantifying the "closeness" of two locations or values in a space.