Assertion: polygon's angle | /r/HasProperty | reflex
Facets:
Source sentences:
text: While concave polygons have reflex angles, convex polygons do not.
text: A concave polygon will always have at least one reflex interior angle—
text: If a polygon has a reflex angle, then it is said to be a concave polygon.
text: If a polygon has no reflex angle, then it is said to be a convex polygon.
text: A dart (or arrowhead) is a concave quadrilateral with bilateral symmetry like a kite, but one interior angle is reflex.