√20 = 4.472135955. 20 is not a perfect square; the result is irrational.

Is 20 a perfect square?

No, 20 is not a perfect square. Its square root is irrational.

What is 4.472135955 squared?

4.472135955 squared is approximately 20. (4.472135955)² ≈ 20

Instant answer with step-by-step solution

√20 = 4.472135955

√20 = 4.472135955

⚠ 20 is not a perfect square — result rounded to 10 significant figures

We need to find √20 — a number that when multiplied by itself equals 20.
20 is not a perfect square. Its square root is irrational.
It falls between √16 = 4 and √25 = 5.
Using the formula √N = N^(1/2): √20 = 20^0.5 = 4.472135955
Verification: 4.472135955 × 4.472135955 ≈ 20 ✓ (rounded to 10 significant figures)

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