If the length of a diagonal of a square is 15cm, how long is each side?
Since all the sides of a square are equal then it would simply be the square root of half of 15 squared or in equation form: ^2 means squared 15^2 = 2x^2 x being the length of one of the sides of the square. The square root of 112.5 is approximately 10.606601717798213 (by calculator) which in centimeters is the length of one side of the square. If your teacher isn’t too concerned with accuracy it may be a good idea to just give the answer to the nearest thousandth which is 10.607cm.
