A rectangular board, can you cut this board into two pieces, and then put it together into a square desktop? Please draw a picture to show your spelling. The side length of the square How much is it? It's 18 decimeters long and 8 decimeters wide

A rectangular board, can you cut this board into two pieces, and then put it together into a square desktop? Please draw a picture to show your spelling. The side length of the square How much is it? It's 18 decimeters long and 8 decimeters wide

The idea of this problem is to find out the side length of the square. The area of this board is 18 times 8, which is equal to 144. Then the side length of the square should be equal to 144, and the square is equal to 12. It's easy to solve the problem when you know the side length of the square. The principle is to leave enough 12 after dropping it, and make up enough 12 after splicing