The square root of 225 is 15.
To understand why this is the case, we can look at the definition of a square root. The square root of a number is a value that, when multiplied by itself, gives the original number. In other words, if ‘x’ is the square root of ‘y’, then x * x = y.
In the case of 225, you can find that when you multiply 15 by itself (15 * 15), the result is indeed 225. Therefore, 15 is the square root of 225. Additionally, you can verify it using a calculator or by factoring, since 225 can be factored as 15 x 15.