In this exercise we estimate π via regular polygons inscribed in the unit circle.

- Compute h
_{1}and h_{2}. - Compute the area of ΔOAC and the area of ΔABC.
- Use your results from 2. to find an underestimate for π.
- Let M be the midpoint of the (shortest) arc from B to C.
Compute the area of ΔBMC

and find a better estimate for π. How could one improve this estimate?

Latest update 24. September 2008 by Iver Ottosen