What is the value of 9 squared?

To determine the value of 9 squared, we look at the definition of squaring a number. Squaring a number means multiplying the number by itself. In this case, we take the number 9 and multiply it by itself:

9 * 9 = 81.

Thus, the value of 9 squared is 81. This understanding of squaring numbers is foundational in mathematics, as it forms the basis for working with exponents and understanding geometric concepts like the area of a square. The other options provided do not align with the calculation of 9 squared, as they result from either incorrect multiplication or misunderstandings of mathematical operations. Therefore, the correct answer is indeed 81.