Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Rechte hoek-nl#Sense
Ángulo recto-es#Sense
Angle droit-fr#Sense
Ορθή γωνία-el#Sense
Ângulo reto -pt#Sense
Derékszög-hu#Sense
Angolu rett-mt#Sense
Ret vinkel-da#Sense
Angolo retto-it#Sense
Right angle-en#Sense
Rechter Winkel-de#Sense