The key is the object is quadrilateral with parallel sides. It is a parallelogram. It is also a rhombus.
A parallelogram has two pairs of congruent sides.
It is a rhombus or a parallelogram
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.
diagonals.
A parallelogram is a quadrilateral with opposite sides parallel and 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.
No. The congruent sides need not be parallel.
A parallelogram.
true
Parallel
Then, the opposite sides are congruent.
False
A parallelogram has two pairs of congruent sides.
parallelogram.
That's a parallelogram.
A parallelogram.
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.