What is the square root of 144?

The square root of a number is a value that, when multiplied by itself, results in the original number. In this case, the original number is 144. To determine the square root, we want to find a number that, when squared (multiplied by itself), equals 144.

Calculating:

12 x 12 = 144.

Therefore, the square root of 144 is indeed 12. Understanding this process is fundamental in mathematics, particularly in areas that involve solving quadratic equations or simplifying expressions. The chosen answer reflects this reasoning and accurately identifies the square root of 144.