The Circumference of a Circle. By Arnold Packer — February 13, 2002 ... Many math educators object. “The power of mathematics is its generalizablity,” they insist.

The radius of the first circle is shown as 3cm. They then increase by 2cm each time: 5cm → 7cm → 9cm → 11cm. So, the radius of the largest circle is 11cm.

The radius of the first circle is shown as 3cm. They then increase by 2cm each time: 5cm → 7cm → 9cm → 11cm. So, the radius of the largest circle is 11cm.