Square Root of 12
Let us take a look at some interesting facts about the number 12 before we begin this lesson. 12 is considered a mathfriendly number. There are 12 months in a year. 12 is the total number of face cards in a deck. There are 12 numbers on the face of a clock. In English, twelve is the largest number comprised of just one syllable.
In this lesson, we will explore the concept of the square root of 12. This lesson also explains the square root of 12 in radical form along with solved examples.
 Square Root of 12: √12 = 3.4641
 Square of 12: 12^{2} = 144
1.  What Is the Square Root of 12? 
2.  Is Square Root of 12 Rational or Irrational? 
3.  How to Find the Square Root of 12? 
4.  Important Notes 
5.  FAQs on Square Root of 12 
6.  Challenging Questions 
What Is the Square Root of 12?
Square root of 12 in the radical form is expressed as √12 and in the exponent form, it is expressed as 12^{1/2}. Square root of 12 rounded to 5 decimal places is 3.46410. We can also express the square root of 12 in its lowest radical form as 2√3. Numbers which have a radical symbol in their lowest form are called surds.
Is Square Root of 12 Rational or Irrational?
A number which cannot be expressed as a ratio of two integers is an irrational number. The decimal form of the irrational number will be nonterminating (i.e. it never ends) and nonrecurring (i.e. the decimal part of the number never repeats a pattern).
Now let us look at the square root of 12.
√12 = 3.4641016151
Do you think the decimal part stops after 3.4641016151? No, it is neverending and you cannot see a pattern in the decimal part. Thus, √12 is an irrational number.
How to Find the Square Root of 12?
Let us follow the steps to find the square root of 12 by long division.
Step 1: Make a pair of digits (by placing a bar over it) from the unit's place since our number is 12.
Let us represent it inside the division symbol.
Step 2: Find a number such that when you multiply it with itself, the product is less than or equal to 12
We know that 3 × 3 = 9 and 9 is less than 12. Now let us divide 12 by 3.
Step 3: Let us place a decimal point and a pair of zeros next to it and continue our division.
Now, multiply the quotient by 2 and the product becomes the starting digit of our next divisor.
Step 4: Choose a number in the unit's place for the new divisor such that its product with a number is less than or equal to 300.
We know that 6 is in the ten's place and our product has to be 300 and the closest multiplication is 64 × 4 = 256
Step 5: Bring down the next pair of zeros and multiply the quotient 34 (ignore the decimal) by 2, which is 68, and the starting digit of the new divisor.
Step 6: Choose a number in the unit's place for the new divisor such that its product with a number is less than or equal to 4400.
Step 7: Add more pairs of zeros and repeat the process of finding the new divisor and product as in step 2.
Note that the square root of 12 is an irrational number, i.e., it is neverending. Hence, we can stop the process after 4 or 5 iterations, and you will get the square root of 12 by the long division method.
Explore square roots using illustrations and interactive examples
Important Notes:
 Square root of 12 in the radical form is expressed as √12
 In exponent form, square root of 12 is expressed as √12 = 12^{1/2}.
 The real roots of √12 are 3.464...
Challenging Questions:
 What is the value of √√√√12
 Simplify( (√12)^{1/2})^{1/2})
Square Root of 12 Solved Examples

Example 1: Tim says that the value of (√12) is the same as (√12). What do you think?
Solution
A negative square root cannot have real roots.
(√12) has real roots but (√12) has only imaginary roots.
Hence, they are not the same. (√12) is not the same as (√12).

Example 2: Help Ryan simplify the square root of 12 to its lowest radical form.
Solution
We need to express 12 as the product of its prime factors.
12 = 3 × 2 × 2
Therefore, √12 = √{ 3 × 2 × 2} = 2√3
Thus, 2√3 is in the lowest radical form.
FAQs on Square Root of 12
What is the square root of 12?
The square root of 12 is 2√3.
What is the square of 12?
The square of 12 is 144.
How do you find the square root of 12?
We can find the square root of 12 by using the long division method.
Is square root of 12 a real number?
No, the square root of 12 is not a real number.
What is the square root of 12 in simplified form?
The square root of 12 in simplified form is 2√3.