Each side of a square is divided into three equal parts by two points on it, which are connected as shown in the diagram below (that is not drawn to scale).
If the smaller, red square has an area of 800, what is the area of the large square?

In the following figure, everything is square other then large rectangle. If the green square has side length 1 and the brown square has side length 2 then what is the area of the rectangle?

A square is divided into 5 rectangles.
Each rectangle has the same area.
The top left rectangle has a width equal to 4, as shown.
What is the area of the square?