This is the Golden Spiral. To get it, you have to understand the Fibonacci sequence, which says if you take any two numbers and add them, you get the first number in the sequence. You then take the larger of the first two numbers and add it to the sum of the two numbers you started with. To create the spiral, you make the numbers in the sequence into squares, and then make two diagonal vertices into points of a circle with a third vertex the center
How are the circles and the sections of the spiral related?