These next set of circles and squares all have there areas (a) and circumferences (c) marked, along with the diameter of the circles and the height of the squares. (Fig. 13-15)



The side-length of square #1 is equal to the diameter of circle #2. The same is true for square #2 and circle #3 and square #3 and circle #4.
Also, circle #1 and square #1 have the same area. As do circle #2 and square #2, circle #3 and square #3 and circle #4 and square #4.
Also, circle #1 and square #2 have the same circumference. As do circle #2 and square #3 and circle #3 and square #4.
Next we stack all the circles and squares on top of each other.
The point marked by the triangles below is the point where the circumference of the circle and the circumference of the square are equal. (Fig. 16)

The point marked by the triangles below is the point where the area of the circle and the area of the square are equal. (Fig. 17)































