Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/36
Is Reference of Plane trigonometry-en#Sense
Trigonometria piana-it#Sense
Ebene Trigonometrie-de#Sense
Trigonometrie plane-fr#Sense
Vlakke driehoeksmeting-nl#Sense
Vlakke trigonometrie-nl#Sense