1. A quadrilateral is a parallelogram if both pairs of opposite side are congruent. 2. A rhombus is a parallelogram with four congruent sides. 3. A square is a parallelogram with four congruent sides and angles. 4. A rectangle is a parallelogram with four congruent angles. 5. A trapezoid is a quadrilateral with exactly one pair of parallel sides. 6. A quadrilateral is a polygon with more than four sides. 7. A parallelogram is always a quadrilateral. 8. A quadrilateral is always a parallelogram. 9. A square is a parallelogram having four angles. 10. A parallelogram is a quadrilateral that has two sets of parallel sides and two sides of congruent angles.
