Square root of 289
289 is a perfect square number which is obtained by square of 17. Hence, the square root of 289 is a rational number. In this minilesson we will learn to find square root of 289 along with solved examples. Let us see what the square root of 289 is.
 Square Root of 289: √289 = 17
 Square of 289: 289^{2} = 83,521
1.  What Is the Square Root of 289? 
2.  Is Square Root of 289 Rational or Irrational? 
3.  How to Find the Square Root of 289? 
4.  FAQs on Square Root of 289 
What Is the Square Root of 289?
The original number whose square is 289 gives the square root of 289.
√289 = 17
The answer which we get on squaring 17 is 289. This makes 289 a perfect square.
Is the Square Root of 289 Rational or Irrational?
A rational number can be either terminating or nonterminating and has a repeating pattern in its decimal part. We saw that √289 = 17. 17 is a whole number. It is possible to express it in p/q form easily. Hence, √289 is a rational number.
How to Find the Square Root of 289?
There are different methods to find the square root of any number. Click here to know more about it.
The factors of 289 are, 1, 17 and 289.
As 289 has more than 2 factors, it is a composite number
To find the square root of 289:
 We can use prime factorization method to obtain one number from each pair of the same numbers and multiply them. The factorization of 289 is 17 × 17 which consists of 1 pair of the same number, 17. Thus, the square root of 289 is √(17 × 17) = 17 itself.
 Since 289 is a perfect square, we can also express it as 17^{2}. The number within square root which gets repeated is 17. Hence, the square root of 289 is 17.
The square root of 289 is 17.
Explore Square roots using illustrations and interactive examples
Important Notes:
 289 is a perfect square as the answer obtained after square root is a rational number.
 The square root of 289 can be simplified to 17 either by using the prime factorization of 289 or by expressing 289 as a square of 17.
Think Tank:
 Can the value of a square root of 289 be decimal?
 Is √289 a real number?
Square Root of 289 Solved Examples

Example 1: What is the difference in lengths of square boxes having area 289 square inches and 169 square inches ?
Solution
As the area of square box is area = length × length
The length of square box having area 289 square inches is √289 = 17 inches.
Similarly the length of box having area 169 square inches is √169 = 13 inches.
The difference in lengths of boxes is (17  13) inches = 4 inches
Hence, the difference in length of square boxes having area 289 square inches and 169 square inches is 4 inches. 
Example 2: Can you determine the radius of circle having area 289π square inches?
Solution
Radius can be found using the formula of area of a circle is πr^{2} square inches. By the given information,
πr^{2} = 289π
r^{2} = 289
By taking the square root on both sides we get, √r^{2}= √289. We know that the square root of r^{2} is r.
By calculating the square root of 289 is 17 inches.
FAQs On Square Root of 289
What are the two square roots of 289?
The square roots of 289 are 17 and 17.
Is 289 a perfect square?
Yes, 289 is a perfect square
Does 289 have a square root?
Yes, 289 has a square root
Can square root of 289 simplified?
289 can be broken down as a product of 17 × 17. Either ways, the square root of 289 gives output as 17.
Is the square root of 289 rational or irrational?
The square root of 289 is rational.
Is square root of 289 a real number?
Yes, the square root of 289 is a real number.