Find the diagonal of a cube if its side equals 5. When applicable, simplify radicals and show all of your work.

7.0711

Step-by-step explanation:

The diagonal of a square of side of length a is a√2.

Here, the length of the square is given as: 5 units.

So, the length of the diagonal is 5√2 units.

But √2 = 1.4142 ... (Approx.)

So, the length of the diagonal, d = 5 X 1.4142.

This is equal to 7. 0711.

So, the answer is 7.0711 units.