111 LearnersLast updated on May 26th, 2025
Square Root of 166
If a number is multiplied by the same number, the result is a square. The inverse of the square is a square root. The square root is used in the field of vehicle design, finance, etc. Here, we will discuss the square root of 166.
What is the Square Root of 166?
The square root is the inverse of the square of the number. 166 is not a perfect square. The square root of 166 is expressed in both radical and exponential form. In the radical form, it is expressed as √166, whereas (166)(1/2) in the exponential form. √166 ≈ 12.8841, which is an irrational number because it cannot be expressed in the form of p/q, where p and q are integers and q ≠ 0.
Finding the Square Root of 166
The prime factorization method is used for perfect square numbers. However, the prime factorization method is not used for non-perfect square numbers where long-division method and approximation method are used. Let us now learn the following methods:
- Prime factorization method
- Long division method
- Approximation method
Square Root of 166 by Prime Factorization Method
The product of prime factors is the prime factorization of a number. Now let us look at how 166 is broken down into its prime factors.
Step 1: Finding the prime factors of 166 Breaking it down, we get 2 x 83: 21 x 831
Step 2: Now we found out the prime factors of 166. Since 166 is not a perfect square, the digits of the number cannot be grouped in pairs.
Therefore, calculating √166 using prime factorization is impossible.
Square Root of 166 by Long Division Method
The long division method is particularly used for non-perfect square numbers. In this method, we should check the closest perfect square number for the given number. Let us now learn how to find the square root using the long division method, step by step.
Step 1: To begin with, we need to group the numbers from right to left. In the case of 166, we need to group it as 66 and 1.
Step 2: Now we need to find n whose square is 1. We can say n as ‘1’ because 1 x 1 is lesser than or equal to 1. Now the quotient is 1; after subtracting 1 - 1 the remainder is 0.
Step 3: Now let us bring down 66, which is the new dividend. Add the old divisor with the same number 1 + 1 we get 2, which will be our new divisor.
Step 4: The new divisor will be the sum of the dividend and quotient. Now we get 2n as the new divisor; we need to find the value of n.
Step 5: The next step is finding 2n x n ≤ 66. Let us consider n as 2, now 2 x 2 x 2 = 44
Step 6: Subtract 66 from 44; the difference is 22, and the quotient is 12.
Step 7: Since the dividend is less than the divisor, we need to add a decimal point. Adding the decimal point allows us to add two zeroes to the dividend. Now the new dividend is 2200.
Step 8: Now we need to find the new divisor that is 9 because 249 x 9 = 2241
Step 9: Subtracting 2241 from 2200 we get the result -41.
Step 10: Now the quotient is 12.9
Step 11: Continue doing these steps until we get two numbers after the decimal point. Suppose if there are no decimal values, continue till the remainder is zero.
So the square root of √166 is approximately 12.88.
Square Root of 166 by Approximation Method
The approximation method is another method for finding the square roots. It is an easy method to find the square root of a given number. Now let us learn how to find the square root of 166 using the approximation method.
Step 1: Now we have to find the closest perfect square of √166. The smallest perfect square of 166 is 144 and the largest perfect square of 166 is 169. √166 falls somewhere between 12 and 13.
Step 2: Now we need to apply the formula that is (Given number - smallest perfect square) / (Greater perfect square - smallest perfect square) Going by the formula (166 - 144) / (169 - 144) = 0.88 Using the formula, we identified the decimal point of our square root. The next step is adding the value we got initially to the decimal number, which is 12 + 0.88 = 12.88.
So the square root of 166 is approximately 12.88.
Common Mistakes and How to Avoid Them in the Square Root of 166
Students do make mistakes while finding the square root, such as forgetting about the negative square root, skipping long division methods, etc. Now let us look at a few of those mistakes that students tend to make in detail.
Mistake 1
Forgetting about the negative square root
It is important to make students aware that a number does have both positive and negative square roots. However, we will be taking only the positive square root, as it is the required one.
For example: √50 = 7.07, there is also -7.07 which should not be forgotten.
Square Root of 166 Examples
Problem 1
Can you help Max find the area of a square box if its side length is given as √138?
The area of the square is 138 square units.
Explanation
The area of the square = side^2.
The side length is given as √138.
Area of the square = side^2
= √138 x √138 = 138.
Therefore, the area of the square box is 138 square units.
Problem 2
A square-shaped building measuring 166 square feet is built; if each of the sides is √166, what will be the square feet of half of the building?
83 square feet
Explanation
We can just divide the given area by 2 as the building is square-shaped.
Dividing 166 by 2 = we get 83.
So half of the building measures 83 square feet.
Problem 3
Calculate √166 x 5.
64.42
Explanation
The first step is to find the square root of 166, which is approximately 12.88.
The second step is to multiply 12.88 with 5.
So 12.88 x 5 ≈ 64.42.
Problem 4
What will be the square root of (138 + 28)?
The square root is 13.
Explanation
To find the square root, we need to find the sum of (138 + 28). 138 + 28 = 166, and then √166 ≈ 12.88.
However, since 138 and 28 are both not perfect squares, this example may need reevaluation. Please adjust accordingly.
Problem 5
Find the perimeter of the rectangle if its length ‘l’ is √138 units and the width ‘w’ is 28 units.
We find the perimeter of the rectangle as 81.48 units.
Explanation
Perimeter of the rectangle = 2 × (length + width).
Perimeter = 2 × (√138 + 28)
= 2 × (11.74 + 28)
= 2 × 39.74
= 81.48 units.
FAQ on Square Root of 166
1.What is √166 in its simplest form?
2.Mention the factors of 166.
3.Calculate the square of 166.
4.Is 166 a prime number?
5.166 is divisible by?
6.How does learning Algebra help students in United States make better decisions in daily life?
7.How can cultural or local activities in United States support learning Algebra topics such as Square Root of 166?
8.How do technology and digital tools in United States support learning Algebra and Square Root of 166?
9.Does learning Algebra support future career opportunities for students in United States?
Important Glossaries for the Square Root of 166
- Square root: A square root is the inverse of a square. Example: 4^2 = 16 and the inverse of the square is the square root, that is √16 = 4.
- Irrational number: An irrational number is a number that cannot be written in the form of p/q, where q is not equal to zero and p and q are integers.
- Principal square root: A number has both positive and negative square roots, but it is usually the positive square root that is used due to its relevance in real-world applications. This is known as the principal square root.
- Perfect square: A perfect square is a number that can be expressed as the square of an integer. For example, 16 is a perfect square because it is 4^2.
- Decimal: A decimal is a number that includes a whole number and a fractional part, separated by a decimal point. For example, 7.86, 8.65, and 9.42 are decimals.
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Jaskaran Singh Saluja
About the Author
Jaskaran Singh Saluja is a math wizard with nearly three years of experience as a math teacher. His expertise is in algebra, so he can make algebra classes interesting by turning tricky equations into simple puzzles.
Fun Fact
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