They can b different sizes
Sometimes similar but it depends
It is sometimes true that two parallelograms are similar. The could be congruent, or dissimilar in that one is not an enlargement of the other.
Always because they have to be 90 degrees, but it could be sometimes I guess if you factor in their different sizes.
Sometimes * * * * * Never. A parallelogram has two pairs of equal angles opposite one another. A trapezoid does not.
They can b different sizes
sometimes
Sometimes similar but it depends
sometimes
Never
Yes
Sometimes.
If they are congruent they must be similar.
If they have the same nuber of sides (angles) then always. If not then never. So, overall, I suppose the answer is sometimes - depending on the number of sides.
It is sometimes true that two parallelograms are similar. The could be congruent, or dissimilar in that one is not an enlargement of the other.
Sometimes. Remember, in order for two polygons to be similar, their angles must be congruent, and their corresponding sides must be proportional. In a rhombus, it is always possible for the angles to differ.
Always because they have to be 90 degrees, but it could be sometimes I guess if you factor in their different sizes.