Assertion: heptagon | /r/HasProperty | concave
Facets:
value: like any polygon
type: OTHER
Source sentences:
text: A heptagon can be concave.
text: Like any polygon, a heptagon may be either convex or concave, as illustrated in the next figure.
text: On the other hand, when its is concave, one or more of its interior angles is larger than 180°.
text: A heptagon can be concave.
text: A heptagon can be concave.