Extended image description for Page 227
The square on the outside is divided into four equal squares by vertical and horizontal lines passing through the midpoints of its sides. A shaded square inside the large square has its vertices positioned at the midpoints of the outer square. The diagonal lines on the outer square that form the sides of the inner square are highlighted with the text: The slave's final and correct answer: the diagonal line. The shaded square has an area of 8. The bottom-left section is the original square with a side of length 2.