130 LearnersLast updated on May 26th, 2025
Square Root of 457
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 457.
What is the Square Root of 457?
The square root is the inverse of the square of the number. 457 is not a perfect square. The square root of 457 is expressed in both radical and exponential form. In the radical form, it is expressed as √457, whereas (457)^(1/2) in the exponential form. √457 ≈ 21.385, 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 457
The prime factorization method is used for perfect square numbers. However, the prime factorization method is not used for non-perfect square numbers where the 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 457 by Prime Factorization Method
The product of prime factors is the prime factorization of a number. Now let us look at how 457 is broken down into its prime factors.
Step 1: Finding the prime factors of 457. Breaking it down, we get 457 is a prime number itself.
Step 2: Since 457 is a prime number, it cannot be factored further.
Therefore, calculating 457 using prime factorization is not applicable.
Square Root of 457 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 457, we need to group it as 57 and 4.
Step 2: Now we need to find n whose square is 4. We can say n as ‘2’ because 2 × 2 is equal to 4. Now the quotient is 2, and after subtracting 4-4, the remainder is 0.
Step 3: Now let us bring down 57, which is the new dividend. Add the old divisor with the same number 2 + 2, we get 4, which will be our new divisor.
Step 4: The new divisor will be the sum of the dividend and quotient. Now we get 4n as the new divisor, we need to find the value of n.
Step 5: The next step is finding 4n × n ≤ 57. Let us consider n as 1, now 41 × 1 = 41.
Step 6: Subtract 57 from 41, the difference is 16, and the quotient is 21.
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 1600.
Step 8: Now we need to find the new divisor that is 425 because 425 × 3 = 1275.
Step 9: Subtracting 1275 from 1600, we get the result 325.
Step 10: Now the quotient is 21.3.
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 √457 is approximately 21.39.
Square Root of 457 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 457 using the approximation method.
Step 1: Now we have to find the closest perfect square of √457. The smallest perfect square less than 457 is 441, and the largest perfect square greater than 457 is 484. √457 falls somewhere between 21 and 22.
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 (457 - 441) ÷ (484-441) = 16/43 ≈ 0.372.
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 21 + 0.372 = 21.372, so the square root of 457 is approximately 21.372.
Common Mistakes and How to Avoid Them in the Square Root of 457
Students do make mistakes while finding the square root, like 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 ≈ 7.071, there is also -7.071 which should not be forgotten.
Mistake 2
Not adding square root symbol in proper places
Not using the square root properly is another mistake that children make. To resolve this, we need to teach children that simplifying the numbers inside the square root is important and then move on to the second step.
For example: √(12+24) = √12 + √24 is a wrong method of using roots. The right way of using roots is √(12+24) = √36.
Mistake 3
Not finding the correct value of a non-perfect square
The first step that needs to be taught to children is to simplify the numbers inside the square root. This is important so that students do not make mistakes while identifying the approximate value.
For example: √50 = 7 is wrong, the correct answer is √50 ≈ 7.071067.
Mistake 4
Confusing the square root symbol with the cube root
Students need to be taught the difference between cube root and square root constantly, as this will help them keep away from mistakes.
For example: √50 and ∛50 are different.
Mistake 5
Making mistakes in long division
Finding a square root using the long division method involves many steps. Due to this, many students might skip a step accidentally, which results in a wrong answer at the end of the sum. This may either happen in subtracting or elsewhere.
Square root of 457 Examples
Problem 1
Can you help Max find the area of a square box if its side length is given as √457?
The area of the square is approximately 457 square units.
Explanation
The area of the square = side².
The side length is given as √457.
Area of the square = side² = √457 × √457 = 457.
Therefore, the area of the square box is approximately 457 square units.
Problem 2
A square-shaped building measuring 457 square feet is built; if each of the sides is √457, what will be the square feet of half of the building?
228.5 square feet
Explanation
We can just divide the given area by 2 as the building is square-shaped.
Dividing 457 by 2 = we get 228.5.
So half of the building measures 228.5 square feet.
Problem 3
Calculate √457 × 5.
Approximately 106.925
Explanation
The first step is to find the square root of 457, which is approximately 21.385, the second step is to multiply 21.385 with 5. So 21.385 × 5 ≈ 106.925.
Problem 4
What will be the square root of (457 - 17)?
The square root is approximately 21.
Explanation
To find the square root, we need to find the difference of (457 - 17). 457 - 17 = 440, and then the square root of 440 is approximately 20.976.
Therefore, the square root of (457 - 17) is approximately 21.
Problem 5
Find the perimeter of the rectangle if its length ‘l’ is √457 units and the width ‘w’ is 40 units.
We find the perimeter of the rectangle as approximately 122.77 units.
Explanation
Perimeter of the rectangle = 2 × (length + width).
Perimeter = 2 × (√457 + 40) ≈ 2 × (21.385 + 40) ≈ 2 × 61.385 ≈ 122.77 units.
FAQ on Square Root of 457
1.What is √457 in its simplest form?
2.Is 457 a prime number?
3.What are the factors of 457?
4.Calculate the square of 457.
5.Is 457 divisible by any number other than 1 and itself?
6.How does learning Algebra help students in Oman make better decisions in daily life?
7.How can cultural or local activities in Oman support learning Algebra topics such as Square Root of 457?
8.How do technology and digital tools in Oman support learning Algebra and Square Root of 457?
9.Does learning Algebra support future career opportunities for students in Oman?
Important Glossaries for the Square Root of 457
- Square root: A square root is the inverse of a square. Example: 4² = 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.
- Prime number: A number greater than 1 that has no positive divisors other than 1 and itself. Example: 457 is a prime number.
- Decimal: A number that contains a whole number and a fraction part separated by a decimal point. Example: 21.385.
- Perimeter: The total distance around the edges of a geometric figure. For a rectangle, it is calculated as 2 × (length + width).
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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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