A square's opposite sides are parallel and all the sides are congruent.
A rhombus.
You must be talking about a rhombus.In a rhombus, all four sides are congruent, opposite angles are congruent, and opposing sides are parallel. Rectangles, squares, and kites must be rhombi, and rhombi must be parallelograms, quadrilaterals, and polygons.
In all parallelograms, opposite angles and opposite sides are congruent. If all four sides are congruent, it's a rhombus. If all four angles are congruent, it's a rectangle. If all four sides and all four angles are congruent, it's a square.
A four-sided polygon with opposite sides parallel and all sides congruent is a square.
Opposite sides are congruent in every parallelogram.Adjacent sides are congruent only if the parallelogramhappens to be a rhombus.
No, opposite sides are equal.
A square
All of them.
rectangle
rhombus
A parallelogram (and all its special cases) has two pairs of opposite sides that are congruent. An isosceles trapezium has one pair of congruent opposite sides. Selected irregular quadrilaterals can have a pair.