Assertion: parallelogram's diagonal | /r/HasProperty | parallelogram
Facets:
Source sentences:
text: A parallelogram with unequal diagonals (i.e. a parallelogram other than a rectangle) is not an isosceles trapezoid, so what's the problem?
text: A rhombus therefore has all of the properties of a parallelogram: for example, opposite sides are parallel; adjacent angles are supplementary; the two diagonals bisect one another; any line through the midpoint bisects the area; and the sum of the squares of the sides equals the sum of the squares of the diagonals (the parallelogram law).