# What is Square Root of 169: Understanding the Basics

## Introduction

Mathematics is a fascinating and challenging subject that has many practical applications in our daily lives. One of the fundamental concepts in mathematics is square roots, which is the inverse operation of squaring a number. In this article, we will explore the concept of square roots and focus on the square root of 169.

## What is Square Root of 169?

The square root of 169 is a number that, when multiplied by itself, gives the result of 169. This number is represented by the symbol “√169” and is equal to 13. The square root is a crucial mathematical concept that helps solve many real-world problems, such as calculating distances, areas, and volumes.

## How to Calculate Square Root of 169?

There are various methods to calculate the square root of a number, such as the long division method, prime factorization method, and the most common one, the radical symbol method. To calculate the square root of 169, we can follow these steps:

1. Write down the number 169.
2. Draw a line underneath it and divide it into two digits each, starting from the right.
3. Starting from the left, pair up the digits and find the largest perfect square that is less than or equal to the left-hand pair. In this case, the largest perfect square is 144.
4. Write down the square root of the perfect square found in step 3. In this case, it is 12.
5. Subtract the perfect square from the pair of digits and bring down the next pair of digits to the right of the remainder.
6. Double the root and place it as a divisor for the current divisor and dividend, then find the next digit of the root by choosing a number to place at the end of the current divisor that will make the divisor equal to or smaller than the current dividend.
7. Repeat steps 5 and 6 until all the pairs of digits have been used up.

## What are Square Roots?

A square root is a mathematical operation that determines the number that, when multiplied by itself, produces the original number. For example, the square root of 16 is 4 because 4 multiplied by 4 is equal to 16. The square root is represented by the symbol “√” and is the inverse operation of squaring a number.

## The Importance of Square Roots

Square roots are essential in many mathematical and scientific applications. They are used to calculate the sides of right-angled triangles, calculate the areas of circles, and in the field of engineering, they are used to calculate the strength of materials, such as the tensile strength of steel.

### Q1. What is a perfect square?

A perfect square is a number that is the square of an integer. For example, 4, 9, 16, 25, 36, and 49 are perfect squares.

### Q2. What is the difference between a square and a square root?

A square is the result of multiplying a number by itself, while a square root is the inverse operation of squaring a number.

### Q3. Can negative numbers have square roots?

Yes, negative numbers have square roots, but they are imaginary numbers. For example, the square root of -1 is denoted as “i,” where “i” represents an imaginary number.

### Q4. Is the square root of 169 a rational or irrational number?

The square root of 169 is a rational number because it can be expressed as a ratio of two integers.

## Conclusion

In conclusion, the secret to finding the square root of 169 is memorization. By committing the square roots of key numbers to memory, you can quickly and easily solve any problem that involves finding a square root. While other methods, such as long division and calculators, can be useful in certain situations, memorization is the most efficient and reliable method for most people. So start memorizing those square roots and watch your math skills soar!