## FANDOM

1,025 Pages

The square root of 2 is an irrational number. It can be represented by $\sqrt{2}$ and has an approximate value of $1.41421356$. The Pythagorean philosopher Hippasus was the first to discover it was irrational. It also the ratio of the length of the hypotenuse to one of the legs of an isosceles right triangle.

This number cannot be written as a fraction.