wat is the squre root of 309

http://www.math.com/students/calculators/source/square-root.htm

The square root of a number can be found using a calculator or by using the long division method.

If you want to find the square root of 309, you can use the calculator provided in the link you provided (http://www.math.com/students/calculators/source/square-root.htm). Type in the number 309 and click on the "Calculate" button. The calculator will then give you the square root of 309.

To find the square root using the long division method, follow these steps:
1. Start by making pairs of digits from right to left. For 309, you would have 3 and 09.
2. Find the largest integer whose square is less than or equal to 3. In this case, it is 1, because 1^2 = 1.
3. Bring down the second pair of digits (09) and double the number you found in the previous step (1). This gives you 2.
4. Find the largest integer (let's call it x) such that when you append it to the current result (which is 1), and you multiply the new number (12) by x, the result (12x) is less than or equal to 209 (obtained by multiplying 2 by 9 and then adding the last digit, which is 9).
5. Once you find the largest x, append it to the current result. So in this case, you would have 129 as the updated result.
6. Subtract the product of the last digit of the new result (9) and x (let's say 8), from the remaining number (209). This gives you 49.
7. Bring down the next pair of digits (00) and double the current result (129). This gives you 258.
8. Find the largest integer x such that when you append it to the current result (which is 129), and you multiply the new number (1290) by x, the result (1290x) is less than or equal to 4900.
9. Once you find the largest x, append it to the current result. In this case, you would have 1298.
10. Subtract the product of the last digit of the new result (8) and x (let's say 8), from the remaining number (4900). This gives you 36.
11. Bring down the next pair of digits (00) and double the current result (1298). This gives you 2596.
12. Repeat Steps 8-11 until you have used all the digits in the original number.
13. At this point, your result should be an approximation of the square root of the original number.

However, please note that this method can be time-consuming, especially for larger numbers, which is why using a calculator might be more convenient.