Assertion: rectangle's side | /r/HasProperty | straight
Facets:
Source sentences:
text: A rectangle is a two-dimensional shape that has four straight sides and four right angles (90°).
text: Because of its right angles, a rectangle has straight sides.
text: A rectangle is a two-dimensional shape that has four straight sides and four right angles (90°).
text: A rectangle has four straight sides with four right angles, but the sides can be different lengths.