C. Both pairs of opposite sides are congruent and parallel.
A quadrilateral with both pairs of opposite sides congruent is a parallelogram.
The Opposite Sides Parallel and Congruent Theorem states that if a quadrilateral has a pair of opposite sides that are parallel and congruent, then the quadrilateral is a parallelogram.
always
Then, the opposite sides are congruent.
Theorem A: A quadrilateral is a parallelogram if its opposite sides are congruent. Theorem B: A quadrilateral is a parallelogram if a pair of opposite sides is parallel and congruent. Theorem C: A quadrilateral is a parallelogram if its diagonals bisect each other. Theorem D: A quadrilateral is a parallelogram if both pairs of opposite angles are congruent.
False. If both pairs of opposite angles of a quadrilateral are congruent then the quadrilateral is a parallelogram.
A quadrilateral with both pairs of opposite sides congruent is a parallelogram.
For the quadrilateral to be a parallelogram, both pairs of opposite angles must be congruent.
The Opposite Sides Parallel and Congruent Theorem states that if a quadrilateral has a pair of opposite sides that are parallel and congruent, then the quadrilateral is a parallelogram.
always
congruent
No. The congruent sides need not be parallel.
Then, the opposite sides are congruent.
its a shape
There is no specific name for such an irregular quadrilateral.
A square
square