Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/36
Is Reference of Quadrilatère circonscriptible-fr#Sense
Tangential quadrilateral-en#Sense
Raaklijnenvierhoek-nl#Sense
Tangentenviereck-de#Sense
Quadrilatero circoscrittibile-it#Sense