About: http://webisa.webdatacommons.org/12519699

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	All the three drawings are executed mathematically precisely, i.e. before how I made these drawings I thoroughly calculated all parameters of their elements: a direction and length of all vectors.
http://www.w3.org/ns/prov#wasQuotedFrom	narod.ru