Geometry
Triangle explorer
Impossible object
List of geometry applets and sites
The Pi Machine
If you know the radius [or the diameter which you can just
chop in two to get the radius] the Pi Machine will find the circumference of the circle, the area of the circle, or even
the volume of a sphere. And if you have a value for the height you can find the surface area or the
volume of a cone or cylindar.
Pi Machine
