The problem of catching the ball in high school mathematics
The diameter of the circumscribed sphere of a cube is the diagonal of the cube. The surface area of a cube is S, that is, A * A * 6 = S (A is the side length of the cube) A? = s/6 diagonal d? =a？ +a？ +a？ = s/2, d d is the radius of the ball diameter, find out.