As shown in the figure below, there is a largest circle in the big square, and there is a largest square in the circle. Calculate the area ratio of the largest square to the small square emergency

As shown in the figure below, there is a largest circle in the big square, and there is a largest square in the circle. Calculate the area ratio of the largest square to the small square emergency

That is, 2. Write a field character, connect the four vertices of the cross in the field with a straight line, and you will understand