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A quadrilateral with both pairs of opposite sides congruent is a parallelogram.
A parallelogram has two pairs of congruent sides, and the opposite sides are congruent.
parallelogram
always
No.
It's a rectangle.
A quadrilateral with both pairs of opposite sides congruent is a parallelogram.
Yes. A parallelogram is a quadrilateral in which both pairs of opposite sides are parallel.
Every quadrilateral has four sides and they are opposite each other. So, ALL quadrilaterals have both pairs of opposite sides.
Every quadrilateral has 2 pairs of opposite sides and so it is not clear what the question is about.
If a quadrilateral has two pairs of opposite congruent sides, then the quadrilateral is a parallelogram.
I would be seriously concerned if a quadrilateral had more than two pairs of opposite sides parallel! A quadrilateral with two pairs of opposite sides parallel is a parallelogram.
A parallelogram has two pairs of congruent sides, and the opposite sides are congruent.
No. Every quadrilateral has 2 pairs of oposite sides. A paralelogram has two pairs of parallel sides. Cf wikipedia!
2
If both pairs of opposite sides are the same length, and both pairs of opposite angles are the same, the quadrilateral is a parallelogram (rhombus, rectangle, or square).
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.