Square and rhombus.
A parallelogram has two pairs of congruent sides, and the opposite sides are congruent.
A quadrilateral with both pairs of opposite sides congruent is a parallelogram.
If a quadrilateral has two pairs of opposite congruent sides, then the quadrilateral is a parallelogram.
2 pairs, the sides opposite each other are congruent to each other
No, you need both pairs of opposite sides to be congruent (i.e. the same size) to be a parallelogram.
Opposite sides of a parallelogram are congruent and so it has 2 pairs of congruent sides.
always
No, it doesn't have to be. A quadrilateral can definitely be a parallelogram only if: - Both pairs of opposite sides are parallel. - Both pairs of opposite sides are congruent. - One pair of opposite sides are both congruent and parallel. - Both pairs of opposite angles are congruent. - The diagonals bisect each other.
Any parallelogram.
parallelogram
parallelogram.
A parallelogram has the 2 pair of opposite congruent sides, but a rectangle (special case of parallelogram) also has the four congruent angles.