Select all that apply.
how are trapezoids and parallelograms related?
both are rhombuses.
both have two pairs of congruent sides.
both have supplementary angles.
both have parallel sides.

-- No.
Neither a trapezoid nor a parallelogram need be a rhombus,
and a trapezoid can never be.

-- No.
Both pairs of opposite sides of a parallelogram are congruent,
but a trapezoid need not have any two of its sides congruent.

-- No.
Any two adjacent angles of a parallelogram are supplementary,
but no two angles of a trapezoid need to be supplementary.

-- Yes.
Both pairs of opposite sides of a parallelogram are parallel,
and one pair of opposite sides of a trapezoid (the 'bases')
are parallel.