The diameter of round dining table is 2 meters, height is 1 meter, the square tablecloth that spreads on the tabletop all around just touches the ground, the area that seeks square tabletop

The diameter of round dining table is 2 meters, height is 1 meter, the square tablecloth that spreads on the tabletop all around just touches the ground, the area that seeks square tabletop

The four corners of the square tablecloth just touch the ground, which indicates that the diagonal length of the square tablecloth is the diameter plus two heights, that is, 2 + 1 + 1 = 4m, so the square side length is twice the root number 2, so the area is 8