Here we will define, analyze, simplify, and calculate the square root of 1221. We start off with the definition and then answer some common questions about the square root of 1221. Then, we will show you different ways of calculating the square root of 1221 with and without a computer or calculator. We have a lot of information to share, so let's get started!
Square root of 1221 definition
The square root of 1221 in mathematical form is written with the radical sign like this √1221. We call this the square root of 1221 in radical form. The square root of 1221 is a quantity (q) that when multiplied by itself will equal 1221.
√1221 = q × q = q2
Is 1221 a perfect square?
1221 is a perfect square if the square root of 1221 equals a whole number. As we have calculated further down on this page, the square root of 1221 is not a whole number.
1221 is not a perfect square.
Is the square root of 1221 rational or irrational?
The square root of 1221 is a rational number if 1221 is a perfect square. It is an irrational number if it is not a perfect square. Since 1221 is not a perfect square, it is an irrational number. This means that the answer to "the square root of 1221?" will have an infinite number of decimals. The decimals will not terminate and you cannot make it into an exact fraction.
√1221 is an irrational number
Can the square root of 1221 be simplified?
You can simplify 1221 if you can make 1221 inside the radical smaller. We call this process "to simplify a surd". The square root of 1221 cannot be simplified.
√1221 is already in its simplest radical form.
How to calculate the square root of 1221 with a calculator
The easiest and most boring way to calculate the square root of 1221 is to use your calculator! Simply type in 1221 followed by √x to get the answer. We did that with our calculator and got the following answer with 9 decimal numbers:
√1221 ≈ 34.942810419
How to calculate the square root of 1221 with a computer
If you are using a computer that has Excel or Numbers, then you can enter SQRT(1221) in a cell to get the square root of 1221. Below is the result we got with 13 decimals. We call this the square root of 1221 in decimal form.
SQRT(1221) ≈ 34.9428104193123
What is the square root of 1221 rounded?
The square root of 1221 rounded to the nearest tenth, means that you want one digit after the decimal point. The square root of 1221 rounded to the nearest hundredth, means that you want two digits after the decimal point. The square root of 1221 rounded to the nearest thousandth, means that you want three digits after the decimal point.
10th: √1221 ≈ 34.9
100th: √1221 ≈ 34.94
1000th: √1221 ≈ 34.943
What is the square root of 1221 as a fraction?
Like we said above, since the square root of 1221 is an irrational number, we cannot make it into an exact fraction. However, we can make it into an approximate fraction using the square root of 1221 rounded to the nearest hundredth.
√1221
≈ 34.94/1
≈ 3494/100
≈ 34 47/50
What is the square root of 1221 written with an exponent?
All square roots can be converted to a number (base) with a fractional exponent. The square root of 1221 is no exception. Here is the rule and the answer to "the square root of 1221 converted to a base with an exponent?":
√b = b½
√1221 = 1221½
How to find the square root of 1221 by long division method
Here we will show you how to calculate the square root of 1221 using the long division method with one decimal place accuracy. This is the lost art of how they calculated the square root of 1221 by hand before modern technology was invented.
Step 1)
Set up 1221 in pairs of two digits from right to left and attach one set of 00 because we want one decimal:
| 12 | 21 | 00 |
Step 2)
Starting with the first set: the largest perfect square less than or equal to 12 is 9, and the square root of 9 is 3. Therefore, put 3 on top and 9 at the bottom like this:
| 3 | |||
| 12 | 21 | 00 | |
| 9 | |||
Step 3)
Calculate 12 minus 9 and put the difference below. Then move down the next set of numbers.
| 3 | |||
| 12 | 21 | 00 | |
| 9 | |||
| 3 | 21 | ||
Step 4)
Double the number in green on top: 3 × 2 = 6. Then, use 6 and the bottom number to make this problem:
6? × ? ≤ 321
The question marks are "blank" and the same "blank". With trial and error, we found the largest number "blank" can be is 4. Replace the question marks in the problem with 4 to get:
64 × 4 = 256.
Now, enter 4 on top, and 256 at the bottom:
| 3 | 4 | ||
| 12 | 21 | 00 | |
| 9 | |||
| 3 | 21 | ||
| 2 | 56 | ||
Step 5)
Calculate 321 minus 256 and put the difference below. Then move down the next set of numbers.
| 3 | 4 | ||
| 12 | 21 | 00 | |
| 9 | |||
| 3 | 21 | ||
| 2 | 56 | ||
| 0 | 65 | 00 | |
Step 6)
Double the number in green on top: 34 × 2 = 68. Then, use 68 and the bottom number to make this problem:
68? × ? ≤ 6500
The question marks are "blank" and the same "blank". With trial and error, we found the largest number "blank" can be is 9. Now, enter 9 on top:
| 3 | 4 | 9 | |
| 12 | 21 | 00 | |
| 9 | |||
| 3 | 21 | ||
| 2 | 56 | ||
| 0 | 65 | 00 | |
That's it! The answer is on top. The square root of 1221 with one digit decimal accuracy is 34.9. Did you notice that the last two steps repeat the previous two steps. You can add decimals by simply adding more sets of 00 and repeating the last two steps over and over.
Square Root of a Number
Please enter another number in the box below to get the square root of the number and other detailed information like you got for 1221 on this page.
Notes
Remember that negative times negative equals positive. Thus, the square root of 1221 does not only have the positive answer that we have explained above, but also the negative counterpart.
We often refer to perfect square roots on this page. You may want to use the list of perfect squares for reference.
Square Root of 1222
Here is the next number on our list that we have equally detailed square root information about.
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