Answer: The square root of 225 is 15.
Explanation: the square root of a number is the value that, when multiplied by itself, gives the original number. In this case, the original number is 225. To find the square root of 225, we need to find a number that, when multiplied by itself, equals 225. That number is 15, because 15 x 15 = 225. Therefore, the square root of 225 is 15.