About: http://webisa.webdatacommons.org/386892676

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	Since ABCD is a square, then angle BAD is a right angle; therefore angle CAD is half a right angle.
http://www.w3.org/ns/prov#wasQuotedFrom	themathpage.com