“That which is provable, ought not to be believed in science without proof,” said Richard Dedekind.  The formula for the volume of a pyramid is usually learnt in junior forms without any proof.  One may think that such proofs require calculus.  In…

We are pleased to announce that our fully fledged GeoGebra 5 with 3D View is now also available for Android tablets and iPads. We’ve got a little more work to do before we can launch in the Windows Store, but…