Assertion: parallelogram's base | /r/HasProperty | perpendicular
Facets:
value: to each other
type: OTHER
Source sentences:
text: It should be noted that the base and the height of the parallelogram are perpendicular to each other whereas the lateral side of the parallelogram is not perpendicular to the base.
text: The base and height of a parallelogram must be perpendicular.
text: The height and base of the parallelogram should be perpendicular to each other.
text: The base and height of a parallelogram must be perpendicular.