The square root of 2 is written as √2. The square root of 2 is often known as root 2, radical 2, or the Pythagoras constant.
Additionally, it is the first irrational number to ever be identified.
Geometrically,
Consider a square with side length 1, and the need to determine the diagonal length.
The formula for the diagonal of a square is derived using the Pythagoras theorem.
The length of a diagonal across a square with sides of one unit of length is equal to the √2.
The value of √2 up to 15 decimal places is 1.414213562373095…The value of √2 is currently known to 1 trillion decimal places.
An intriguing fact about paper sizes is that they are dependent on √2.
The international paper size standard ISO 216 (International Organisation for Standardisation) is the standard that paper sizes are all based on.
In the ISO paper size system, the height-to-width ratio of all pages is the square root of two (1.4142 : 1). In other words, the width and the height of a page relate to each other like the side and the diagonal of a square.
- Non-terminating, non-repeating decimal representation.
- The first irrational number identified was the number √2.
- √2 is also called as the Pythagoras constant.
- √2 represents the diagonal of a unit square.
