trapezoid
Step-by-step explanation:
Trapezoids have only one pair of parallel sides; parallelograms have two pairs of parallel sides. A trapezoid can never be a parallelogram. The correct answer is that all trapezoids are quadrilaterals.
D
In a parallelogram, opposite sides are parallel and congruent.
In trapezoid, only one pair of opposites sides are parallel , but they are not congruent. so, trapezoid is not a parallelogram
triangle and cube
step-by-step explanation: