Assertion: pentagon's side | /r/HasProperty | straight
Facets:
Source sentences:
text: A pentagon has 5 straight sides.
text: Polygons are flat, enclosed shapes with sides that are straight lines.
text: The pentagon’s sides need to be straight: if any of them are curved, then the shape does not qualify as a pentagon.
text: The perimeter, P , of a pentagon is the distance around its five straight sides.