# Square Root/Examples/2

## Decimal Expansion

The decimal expansion of the square root of $2$ starts:

$\sqrt 2 \approx 1 \cdotp 41421 \, 35623 \, 73095 \, 04880 \, 16887 \, 24209 \, 69807 \, 85697 \ldots$

## Also known as

$\sqrt 2$ is sometimes known as Pythagoras's constant, for Pythagoras of Samos.