In the post “Volume of Pyramids with GeoGebra” some elementary proofs of the formula for the volume of a pyramid illustrated with GeoGebra are introduced. In this post, some methods of deriving the formula for the volume of spheres would be…

“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…