Square Root of 9
The square root of 9 is about 3. Square roots reverse squaring and are essential in geometry and the quadratic formula.
√9 = 3 exactly: 9 is the square of 3, so the table shows the whole truth with no rounding at all. The ladder around it confirms the fit — 4 sits 5 below and 16 sits 7 above, gaps that widen by exactly two at every rung. The geometry backs the number: a square with side 3 covers exactly 9 square units of area, the picture behind every fact on this page. The modular checks agree as well: divided by 9, 9 leaves 0, one of the 0, 1, 4, 7 remainders every square is allowed.
| Expression | Value |
|---|---|
| √9 | 3 |
Frequently asked questions
What is the square root of 9?
The square root of 9 is about 3. It is the number that, multiplied by itself, gives 9.
Is 9 a perfect square?
Yes — 3 × 3 = 9, so 9 is a perfect square and its square root is exact.
What does √ mean?
√ is the radical sign, short for square root. √9 asks: which number times itself equals 9? Here the answer is about 3.