Assertion: polygon's vertex | /r/HasProperty | oriented around the triangle
Facets:
value: counterclockwise
type: MANNER
Source sentences:
text: Note that the signed area will be positive if the vertices V 0 V 1 V 2 are oriented counterclockwise around the triangle, and will be negative if the triangle is oriented clockwise; and so, this area computation can be used to test for a triangle's orientation.