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The square root of 66 is approximately \( 8.12 \). Therefore, the closest answer to \( \sqrt{66} \) from the provided options is \( 8 \).

Would you like more details on how to estimate square roots, or have any other questions?

Here are 5 related questions to consider:
1. What is the square root of 65?
2. How do you estimate square roots without a calculator?
3. How does the square root function behave for perfect squares?
4. What are the properties of irrational numbers like \( \sqrt{66} \)?
5. How can you simplify square roots for non-perfect squares?

**Tip:** For square roots of non-perfect squares, it's often helpful to remember the squares of numbers around it (e.g., 8² = 64 and 9² = 81) to estimate the value.

Find out how to estimate the square root of 66 with a step-by-step explanation. Learn key concepts such as square root approximation, irrational numbers, and how to use nearby perfect squares like 64 and 81 for estimation. Ideal for students in Grades 6-8.

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