The square root of 27 can be simplified by factoring 27 into its prime factors.

$\sqrt{27} = \sqrt{3^3} = \sqrt{3^2 \times 3}$

Now, you can take the square root of $3^2$ (which is 9) out of the radical:

$\sqrt{27} = 3\sqrt{3}$

So, the simplest radical form of $\sqrt{27}$ is $3\sqrt{3}$.

Would you like more details or have any other questions?

Here are 5 related questions:

1. How would you simplify $\sqrt{72}$?
2. What is the value of $\sqrt{12}$ in simplest radical form?
3. How do you simplify $\sqrt{50}$?
4. Can you simplify $\sqrt{18}$?
5. What is the simplified form of $\sqrt{75}$?

Tip: When simplifying square roots, look for perfect squares (like 4, 9, 16, etc.) within the number to factor out.