# Mathematical symbols – square root

The square symbol (√) in mathematics represents the square root of a number. The square root of a number is a value that, when multiplied by itself, gives the original number. For example, the square root of 25 (√25) is 5 because 5 multiplied by itself equals 25.

History of the Square Root Symbol:

1. Ancient Origins: The concept of square roots has been known since ancient times. Ancient civilizations, such as the Babylonians and Egyptians, had methods for approximating square roots, but they didn’t use a specific symbol for it.
2. Greek Mathematics: In ancient Greece, mathematicians like Pythagoras and Euclid explored the properties of numbers and geometry. They were aware of square roots, but they didn’t use a symbol for them. Instead, they expressed square roots verbally or geometrically.
3. Renaissance and the Symbol (√): The modern notation for the square root, including the use of the symbol (√), began to emerge during the European Renaissance in the 16th century. The symbol (√) is believed to have been introduced by the Italian mathematician Niccolò Fontana Tartaglia in his work “General Trattato di Numeri et Misure” published in 1556. The symbol (√) is thought to be a simplification of the Latin word “radix,” meaning “root.”
4. Further Development: During the 17th and 18th centuries, mathematicians like René Descartes and Leonhard Euler refined the notation for square roots and other mathematical symbols, helping to establish a standardized mathematical notation.

Today, the square root symbol (√) is a fundamental part of mathematical notation and is widely used in various branches of mathematics and science. It represents an essential concept for solving equations, working with geometric figures, and understanding the relationships between numbers.