72 is not a perfect square. Itis represented as√72. The square root of 72 can only be simplified.In this mini-lesson we will learn to find square root of 72by long division method along with solved examples. Let us see what the square root of 72is.
- Square Root of 72:√72= 8.4852
- Square of 72: 722 = 5184
1. | What Is the Square Root of 72? |
2. | IsSquare Root of 72 Rational or Irrational? |
3. | How to Find the Square Root of 72? |
4. | FAQs on Square Root of 72 |
What Is the Square Root of 72?
The original number whose square is 72 is thesquare rootof 72. Can you find what is that number? Itcan be seen thatthere are nointegers whose square gives 72.
√72= 8.4852
To check this answer, we can find (8.4852)2and we can see that we get a number 71.99861904. This number is very close to 72when its rounded to its nearest value.
Is the Square Root of 72Rational orIrrational?
Any number which iseither terminating or non-terminating and has a repeatingpattern in its decimal part is arational number. We saw that√72= 8.48528137423857. This decimal numberis non-terminating and the decimal part has no repeating pattern. So it is NOT a rational number. Hence,√72is an irrational number.
Important Notes:
- 72lies between 64and 81. Hence,√72 lies between √64 and√81, i.e., √72lies between 8and 9.
- Square root of a non-perfect square number in the simplest radical form can be found using prime factorization method. For example: 72= 2 × 2 × 2 × 3 × 3. So, √72=√(2 × 2 × 2 × 3 × 3)= 6√2.
How to Find the Square Root of 72?
There are differentmethods to find the square root of any number. We canfind the square root of 72 using long division method.
Click hereto know more about it.
Simplified Radical Form of Square Root of 72
72is a compositenumber. Hencefactors of 72are1, 2, 3, 4, 6, 8, 9 12, 18, 24, 36, and 72. When we find the square root of any number, we take one number from each pair of the same numbers from its prime factorization and we multiply them. The factorization of 72is 2 × 2 × 2 × 3 × 3which has 1pairof the same number. Thus, the simplest radical form of √72is 6√2.
Square Root of 72by Long Division Method
The square root of 72can be found using the long division as follows.
- Step 1: In this step, we pair off digits of a given number starting with a digit at one's place. We put a horizontalbar to indicatepairing.
- Step 2:Now we need to find a number which on squaring gives value less than or equal to 72. As we know, 8× 8= 64 < 72. The divisor obtained is 8and the quotient is 8.
- Step 3:Now, we have to bring down 00 and multiply the quotient by 2 which gives us 16.
- Step 4: 4is writtenatone's place of new divisor because when 164is multiplied by 4, 656 is obtained which is less than 800. The obtained answer now is 144and we bring down 00.
- Step 5: The quotient is now 84and itis multiplied by 2. Thisgives 168, which then would become the starting digit of the new divisor.
- Step 6: 7is writtenatone's place of new divisor because when 1688is multiplied by 8, 13504is obtained which is less than 14400. The obtained answer now is 896 and we bring down 00.
- Step 7: The quotient is now 848 and itis multiplied by 2. Thisgives 1696, which then would become the starting digit of the new divisor.
- Step 8: 5is writtenatone's place of new divisor because when 16965is multiplied by 8, 84825is obtained which is less than 89600. The obtained answer now is 4775and we bring down 00.
So far we have got √72= 8.485. On repeating this process further, we get,√72= 8.48528137423857
Explore square roots using illustrations and interactive examples.
- Square Root of 61
- Square Root of 63
- Square Root of 65
- Square Root of 68
- Square Root of 85
Think Tank:
- Are√-72and -√72same ?
- Is √-72a real number?
FAQs on Square Root of 72
Can the square root of 72be simplified?
Yes, the square root of 72canbe simplified and can be expressed in radical form as 6√2.
What is the square root of 72rounded to its nearest tenth?
Rounding off the square root of 72to its nearest tenth means to have one digit after the decimal point.
√72= 8.485can be rounded to its nearest tenth as 8.5.
Does 72have a square root?
Square root of 72can be written as6√2 andit cannot be simplified further as it is not a perfect square.
What is the square root of 72simplified?
72is not a perfect square and hence its square root is not a whole number. √72= 8.48528137423857 (approx.)
Is the square root of 72rational or irrational?
The square root of 72is irrational.
Is square root of 72a real number?
Yes, the square root of 72is a real number.