Approximate the area of a circle using inscribed polygons.

Using pi_circle.exe (from the University of Arizona):

  1. First, if the figure on the screen looks like an ellipse rather than a circle use the arrow keys to transform the figure into a circle.
  2. Press .
  3. Enter the number of sides of the polygon you wish to inscribe in the circle followed by pressing .
  4. Repeat the latter step.