Question

name of the symbol used to denote square root?

Answer 1

The radical symbol √ (with a line over what you're taking a root of) denotes root.
The symbol without any other numbers, means square root, while with a number like 3√ means take cube root, 4√ fourth root, etc.

If you want to type this symbol in Windows, hold down the <Alt> key on the keyboard, then type (on the number pad) 251, then let go of the <Alt> key.

You can also denote roots by fractional exponents: 1/2 power is the square root,
1/3 power is the cube root, etc and this works if you have an xy (exponentiation)
key on your calculator and want to compute roots.
The symbol used to make a root is √

Answer 2

thanks

Answer 3

@helper99 excellent response