neliöin

Neliöin is a Finnish word that translates to "squared" in English. It refers to the mathematical operation of multiplying a number by itself. For example, five squared, written as 5², is equal to 5 * 5, which is 25. This operation is fundamental in algebra and geometry.

In geometry, the concept of squaring is directly related to the area of a square. A square with a side length of 's' has an area of s * s, or s². This is where the term "squared" originates. The unit of area is often expressed in square units, such as square meters (m²) or square feet (ft²), indicating that it is the result of a length multiplied by itself.

The operation of squaring is also important in various mathematical formulas and concepts. For instance, in the Pythagorean theorem, which describes the relationship between the sides of a right-angled triangle, the squares of the two shorter sides add up to the square of the longest side (a² + b² = c²). In statistics, the variance is calculated using the squares of the deviations from the mean. Squaring is also used in functions, such as the quadratic function y = x², which represents a parabola. The inverse operation of squaring is taking the square root.