Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/36
Is Reference of Innere Wechselwinkel-de#Sense
Verwisselende binnenhoeken-nl#Sense
Angoli alterni interni-it#Sense
Angles alternés internes-fr#Sense
Alternate interior angles-en#Sense