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.
Only a parallelogram. You can technically say a square does as well, although all sides are congruent in a square (compared to the parallelogram with two sets of opposite sides congruent).
A quadrilateral in which diagonal are not congruent and only larger diagonal is perpendicular bisector of smaller diagonal then it is known as kite -- Mohan S. Vighe
Square
a parallelogram, rectangle, rombus, and square all are quadrilaterals. a quadrilateral means a shape with 4 sides. only 2 sides are congruent in a parallelogram 2 sides are congruent in a rectangle 4 sides are congruent in a rombus 4 sides are congruent in a 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.
Only a parallelogram. You can technically say a square does as well, although all sides are congruent in a square (compared to the parallelogram with two sets of opposite sides congruent).
square
No, a parallellogram is a quadrilateral with two pair of congruent sides and a trapezoid is a quadrilateral with only one pair of congruent sides.
A quadrilateral in which diagonal are not congruent and only larger diagonal is perpendicular bisector of smaller diagonal then it is known as kite -- Mohan S. Vighe
C. Both pairs of opposite sides are congruent and parallel.
Square
a parallelogram, rectangle, rombus, and square all are quadrilaterals. a quadrilateral means a shape with 4 sides. only 2 sides are congruent in a parallelogram 2 sides are congruent in a rectangle 4 sides are congruent in a rombus 4 sides are congruent in a square
The only quadrilateral that fulfills both criteria is a rectangle ( a square is a special rectangle where all 4 sides are congruent).
Opposite sides are congruent in every parallelogram.Adjacent sides are congruent only if the parallelogramhappens to be a rhombus.
This figure is infact a square, because a square it the only regular quadrilateral.
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.