Assertion: parallelogram | /r/HasProperty | isosceles trapezoids
Facets:
value: outside the usa
type: LOCATION
Source sentences:
text: If parallelograms were isosceles trapezoids, then they would have properties like diagonals of the same length, or congruent base angles.
text: It remains true that some parallelograms (namely rectangles) are isosceles trapezoids (or trapeziums outside the USA), but a general parallelogram is not.
text: I still fail to see what is the advantage of making parallelograms trapezoids, when parallelograms do not have base congruent angles, so it is a bit of a contradiction (to put it lightly) to prove a theorem like "isosceles trapezoids have congruent base angles" and then say "well, parallelograms are isosceles trapezoids, but unless they are rectangles they do not satisfy the above property about angles".