Chapter-26-1: Find volume

Original code by [url=https://www.geogebra.org/u/mathmagic]mathmagic[/url]. More examples here:[br][br][url=https://www.geogebra.org/m/jrmzqk5z]https://www.geogebra.org/m/jrmzqk5z[/url]

Information: Chapter-26-1: Find volume