Question

select the properties of a trapezoid

both pairs of opposite sides are congruent
both pairs of opposite sides are parallel
diagonals are perpendicular
diagonals bisect each other
2 pairs of consecutive congruent sides
diagonals are congruent
exactly one pair of opposite angles congruent
one pair (legs) of opposite sides congruent
all pairs of consecutive angles are supplementary
both pairs of opposite angles are congruent
all 4 angles are congruent(right)
has 4 sides
both pairs of base angles are congruent
diagonals bisect both pairs of opposite angles
all 4 sides are congruent
exactly one pair of parallel sides

Explanation:

A trapezoid is a quadrilateral (so it has 4 sides). By definition, it has exactly one pair of parallel sides. When considering the properties of angles, since the parallel sides are cut by transversals (the non - parallel sides), all pairs of consecutive angles (adjacent angles along a non - parallel side) are supplementary.

Answer:

Has 4 sides, All pairs of consecutive angles are supplementary, Exactly one pair of parallel sides.