Answer:
B) parallel
Explanation:
If one pair of opposite sides of a quadrilateral is both congruent and parallel, then the quadrilateral is a parallelogram. This is because a parallelogram is defined as a quadrilateral with two pairs of parallel sides.
The other options are not correct:
- A) perpendicular: A parallelogram does not have to have perpendicular sides.
- C) increasing: A parallelogram does not have to have increasing sides.
- D) decreasing: A parallelogram does not have to have decreasing sides.
Note:
The opposite sides of the parallelogram are both congruent and parallel.