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.
Trapezoid.
a parallelogram
No, you need both pairs of opposite sides to be congruent (i.e. the same size) to be a parallelogram.
If both pairs of opposite angles of a quadrilateral are congruent, then it is a parallelogram.
A quadrilateral with both pairs of opposite sides congruent is a parallelogram.
False. If both pairs of opposite angles of a quadrilateral are congruent then the quadrilateral is a parallelogram.
A parallelogram.
A parallelogram has two pairs of congruent sides, and the opposite sides are congruent.
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.
For the quadrilateral to be a parallelogram, both pairs of opposite angles must be congruent.
Yes
True
Diamond
Trapezoid.
If a quadrilateral has two pairs of opposite congruent sides, then the quadrilateral is a parallelogram.