Instruction
1
Find the square to the 1st side. Let's build the number 15 in the square, get the 225.
2
Find square 2nd side. Let's build the number 9 in the square, get 81.
3
Add the results of the 1st and 2nd step. Add 225 to 81, get 306.
4
Calculate the square root of the result of the 3rd step. Root of the number 306 is approximately equal to 17.49 inches. This is the length of the hypotenuse.