external angle

English Thesaurus

1. the supplement of an interior angle of a polygon (noun.shape)

hypernym	:	angle,
definition	:	the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians (noun.shape)

hyponym	:	hip,
definition	:	(architecture) the exterior angle formed by the junction of a sloping side and a sloping end of a roof (noun.shape)