About: http://webisa.webdatacommons.org/21004010

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This formula also works for cylinders ??? which are sort of prisms with a circular base ??? and generally any solid that has congruent cross sections.
http://www.w3.org/ns/prov#wasQuotedFrom	dummies.com