What is the square root of 361?

Determine the square root of 361.
The square root of a number is the value that returns the original number when multiplied by itself.
Find the prime factors of 361:
$361=19\times 19$
Take square root from both sides of the above equation:
$361=19\times 19\Rightarrow 361=19$
Therefore, the square root of 361 is 19.