### What is Square?

Square roots work the opposite way of a square.

**For example :** The square of the numbers 3 is 9, therefore the square root of number 9 is 3.

## Definition of Square Root

The square root of a number is a value that can be multiplied by itself to give the original number.

The square root of 9 is 3, because when 3 is multiplied by itself, you get 9.

### Decimal Numbers

Decimal numbers can also be squared. And therefore you can find their square root too.

For example, the square of 3.13 is 9.77 and so the square root is 3.13

## The Square Root Symbol

√ The square root symbol as you can see looks like a tick, and was introduced hundreds of years ago as a dot with flick upwards.

So the √25 = 5

## Perfect Squares

Perfect squares are squares of whole numbers. Let us look at a few perfect squares.

Here is a list of squares from 1 to 15.

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |

1 | 4 | 9 | 16 | 25 | 36 | 49 | 64 | 81 | 100 | 121 | 144 | 169 | 196 | 225 |

**For more interesting Maths worksheets and lessons, go to :** Maths for Kids