In this page, square of a number and square root of a number are revised in a simple thought process.

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What is `3^2`?

- `9`
- `9`
- `6`

The answer is "`9`".

An exponent of power `2` is called *square* of the number.

eg: Square of `7` is `7^2 = 49`.

Which of the following is a meaning for the word "square"?

- the 2D shape of equal sides and `90^@` angles between the sides
- the 2D shape of equal sides and `90^@` angles between the sides

The answer is "the 2D shape of equal sides and `90^@` angles between the sides".

The exponent square is representative of "area of the shape square, side to the power 2".

What is `16^(1/2)`?

- `4`
- `4`
- `256`

The answer is "`4`".

What is `root(2)(144)`?

- `4`
- `12`
- `12`

The answer is "`12`".

An exponent of power `1/2` or the `2`nd root is called *square root* of the number.

eg: Square root of `64` is `64^(1/2) = root(2)(64) = 8`.

The power of the root need not be mentioned for square roots

`root(2)(64) = sqrt(64)`.

What is square of `4`?

- `42`
- `16`
- `16`

The answer is "`16`".

Square of `4` is `4^2`.

What is square root of `9`?

- `4.5`
- `3`
- `3`

The answer is "`3`".

Square root of `9` is `root(2)(9) = 9^(1/2)`.

What is `sqrt(100)`?

- `10`
- `10`
- `2`

The answer is "`10`".

the symbol `sqrt()` is the square root.

What is the term used to refer "a number to the power of `2`"?

- Pronunciation : Say the answer once

Spelling: Write the answer once

The answer is "square".

What is the term used to refer "a number to the power of `1/2`"?

- Pronunciation : Say the answer once

Spelling: Write the answer once

The answer is "square root".

**Square of a number** : A number multiplied by itself is the square of the number.

eg: `6^2 = 6xx6 = 36` **Square Root of a number** : Square root of a value is the number whose square is the given value.

eg: `sqrt(36) = 6` as `6^2=36`.

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