About: http://webisa.webdatacommons.org/54162572

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	In a quadrilateral if both pairs of opposite angles are equal, then the figure is a parallelogram.
http://www.w3.org/ns/prov#wasQuotedFrom	themathpage.com