Assertion: parallelogram | /r/HasProperty | line
Facets:
Source sentences:
text: The diagonals of a parallelogram -- lines that extend from one corner to the opposite corner -- bisect one another.
text: A parallelogram is two lines that don't intersect
text: Reason for statement 10: If one pair of opposite sides of a quadrilateral are both parallel and congruent, then the quadrilateral is a parallelogram (lines 9 and 7).