141 LearnersLast updated on May 26th, 2025
Square Root of 1245
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 1245.
What is the Square Root of 1245?
The square root is the inverse of the square of the number. 1245 is not a perfect square. The square root of 1245 is expressed in both radical and exponential form. In the radical form, it is expressed as √1245, whereas (1245)^(1/2) in the exponential form. √1245 ≈ 35.268, 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 1245
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 1245 by Prime Factorization Method
The product of prime factors is the prime factorization of a number. Now let us look at how 1245 is broken down into its prime factors.
Step 1: Finding the prime factors of 1245 Breaking it down, we get 3 x 5 x 83: 3^1 x 5^1 x 83^1
Step 2: Now we found out the prime factors of 1245. The second step is to make pairs of those prime factors. Since 1245 is not a perfect square, therefore the digits of the number can’t be grouped in pairs.
Therefore, calculating 1245 using prime factorization is impossible.
Square Root of 1245 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 1245, we need to group it as 45 and 12.
Step 2: Now we need to find n whose square is 12. We can say n as ‘3’ because 3 x 3 is lesser than or equal to 12. Now the quotient is 3, and after subtracting 9 from 12, the remainder is 3.
Step 3: Now let us bring down 45 which is the new dividend. Add the old divisor with the same number, 3 + 3, and we get 6 which will be our new divisor.
Step 4: The new divisor will be 62n. We need to find the value of n.
Step 5: The next step is finding 62n x n ≤ 345. Let us consider n as 5. Now 625 x 5 = 3125.
Step 6: Subtract 3125 from 3450. The difference is 325, and the quotient is 35.
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 32500.
Step 8: Now we need to find the new divisor that is 705 because 705 x 5 = 3525.
Step 9: Subtracting 3525 from 32500 we get the result 29275.
Step 10: Now the quotient is 35.26
Step 11: Continue doing these steps until we get two numbers after the decimal point. Suppose if there is no decimal values continue till the remainder is zero
So the square root of √1245 is approximately 35.268.
Square Root of 1245 by Approximation Method
The approximation method is another method for finding 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 1245 using the approximation method.
Step 1: Now we have to find the closest perfect square of √1245. The smallest perfect square less than 1245 is 1225, and the largest perfect square greater than 1245 is 1296. √1245 falls somewhere between 35 and 36.
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 (1245 - 1225) ÷ (1296 - 1225) = 20 / 71 ≈ 0.282 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 35 + 0.282 ≈ 35.268, so the square root of 1245 is approximately 35.268.
Common Mistakes and How to Avoid Them in the Square Root of 1245
Students do make mistakes while finding the square root, likewise forgetting about the negative square root and 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.
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. 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 ≈ 7.071.
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 1245 Examples
Problem 1
Can you help Max find the area of a square box if its side length is given as √1245?
The area of the square is approximately 1550.17 square units.
Explanation
The area of the square = side^2.
The side length is given as √1245.
Area of the square = side^2 = √1245 x √1245 = 35.268 x 35.268 ≈ 1550.17
Therefore, the area of the square box is approximately 1550.17 square units.
Problem 2
A square-shaped building measuring 1245 square feet is built; if each of the sides is √1245, what will be the square feet of half of the building?
622.5 square feet
Explanation
We can just divide the given area by 2 as the building is square-shaped.
Dividing 1245 by 2 = 622.5
So half of the building measures 622.5 square feet.
Problem 3
Calculate √1245 x 5.
176.34
Explanation
The first step is to find the square root of 1245, which is approximately 35.268.
The second step is to multiply 35.268 with 5.
So, 35.268 x 5 = 176.34.
Problem 4
What will be the square root of (1245 + 10)?
The square root is approximately 35.355.
Explanation
To find the square root, we need to find the sum of (1245 + 10)
1245 + 10 = 1255, and then √1255 ≈ 35.355.
Therefore, the square root of (1245 + 10) is approximately ±35.355.
Problem 5
Find the perimeter of the rectangle if its length ‘l’ is √1245 units and the width ‘w’ is 38 units.
We find the perimeter of the rectangle as approximately 146.536 units.
Explanation
Perimeter of the rectangle = 2 × (length + width)
Perimeter = 2 × (√1245 + 38)
= 2 × (35.268 + 38)
= 2 × 73.268
= 146.536 units.
FAQ on Square Root of 1245
1.What is √1245 in its simplest form?
2.Mention the factors of 1245.
3.Calculate the square of 1245.
4.Is 1245 a prime number?
5.1245 is divisible by?
6.How does learning Algebra help students in Canada make better decisions in daily life?
7.How can cultural or local activities in Canada support learning Algebra topics such as Square Root of 1245?
8.How do technology and digital tools in Canada support learning Algebra and Square Root of 1245?
9.Does learning Algebra support future career opportunities for students in Canada?
Important Glossaries for the Square Root of 1245
- 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; however, it is always a positive square root that has more prominence due to its uses in the real world. That is the reason it is also known as a principal square root.
- Prime factorization: It is the expression of a number as the product of its prime factors. For example, the prime factorization of 18 is 2 x 3 x 3.
- Approximation method: A technique used to find an estimated value of a number, often used for calculating non-perfect square roots.
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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.
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