A square
A parallelogram has two pairs of congruent sides.
A parallelogram has two pairs of congruent sides.
Two pairs of adjacent sides are congruent. The angles between the non-congruent sides are congruent.
Two pairs of congruent angles and one pair of congruent sides ( sides not between the pairs of angles ).
A polygon.
A parallelogram has two pairs of congruent sides.
A parallelogram has two pairs of congruent sides, and the opposite sides are congruent.
A parallelogram has two pairs of congruent sides.
rectangle
Diamond
Yes, but in fact, all four (two pairs of two) are congruent.
Two pairs of adjacent sides are congruent. The angles between the non-congruent sides are congruent.
A Rhombus.
Two pairs of congruent angles and one pair of congruent sides ( sides not between the pairs of angles ).
A polygon.
Some forms of irregular octagons.
A parallelogram or a selection of polygons with 6 or more sides.