√129 = 11.3578166916. 129 is not a perfect square; the result is irrational.

Is 129 a perfect square?

No, 129 is not a perfect square. Its square root is irrational.

What is 11.3578166916 squared?

11.3578166916 squared is approximately 129. (11.3578166916)² ≈ 129

Instant answer with step-by-step solution

√129 = 11.3578166916

√129 = 11.3578166916

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

We need to find √129 — a number that when multiplied by itself equals 129.
129 is not a perfect square. Its square root is irrational.
It falls between √121 = 11 and √144 = 12.
Using the formula √N = N^(1/2): √129 = 129^0.5 = 11.3578166916
Verification: 11.3578166916 × 11.3578166916 ≈ 129 ✓ (rounded to 10 significant figures)

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