A sandbox with points A B C D is shown. Diagonals are drawn from point A to point C and from point D to point B and intersect at a point in the middle. The lengths of A D and A B are 29 inches. The lengths of D C and B C are 25 inches. The distances from point D to the middle point and from the middle point to point B are congruent. Kara is building a sandbox shaped like a kite for her nephew. The top two sides of the sandbox are 29 inches long. The bottom two sides are 25 inches long. The diagonal DB has a length of 40 inches. What is the length of the diagonal AC? inches