About: http://webisa.webdatacommons.org/377271737

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	B.C. - present It seems to have been known from most ancient of times that the ratio of the circumference and diameter of a circle is a constant, but what is that constant?
http://www.w3.org/ns/prov#wasQuotedFrom	rice.edu