The sides of the rectangle are 8 and 15 cm. Find its diagonal.

The values of the sides of the rectangle are 8 cm and 15 cm. To determine the diagonal of the rectangle, imagine a right-angled triangle, which is formed by the sides of the rectangle and the diagonal. The sides of the rectangle will be the legs of the right triangle, and the diagonal will be the hypotenuse. Using the Pythagorean theorem, we get:

8 ^ 2 + 15 ^ 2 = c ^ 2;

64 + 225 = c ^ 2;

c ^ 2 = 289;

c = 17 cm.

Answer: The value of the diagonal of the rectangle is 17 cm.