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81 is a square number because 81 is 9.9 x 9 and that makes is a square number. Somw how, i don't even know why 9.9 x 9 = 81. So that's all i know, that's alli can say.

Q: Why is 81 a square number?

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81 is a square number

The square root of 6561 is 81

No but 81 is a square number

The square root of 81 is not an irrational number ergo its square root equals to 9.

Yes. Square root of 81= 9

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The square number of 81 is 9. 9 x 9 = 81

81 is a square number

The square root of 81 is 9 which is a rational number

The square root of 6561 is 81

No but 81 is a square number

3 is the square root of 9. 9 is a square number. 9 is the square root of 81. 81 is a square number.

The square root of any number between 64 and 81.The square root of any number between 64 and 81.The square root of any number between 64 and 81.The square root of any number between 64 and 81.

81 is a perfect square because 81 = 9 x 9

-81-14 is not a complex number. And its square is 9025.

Yes. Square root of 81= 9

The square root of 81 is 9. The square roots of 81 are 9 and -9.

It is a square number