Assertion: triangle's side | /r/HasProperty | straight
Facets:
value: " even
type: DEGREE
Source sentences:
text: It has three straight sides and three vertices.
text: In other words, it is a closed 2D shape having three straight sides.
text: It may seem strange that the root means "bent" even though the sides of a triangle or trapezoid are straight, but each leg is bent relative to the adjoining legs.