A square, always, a rhombus, always, a parallelogram, always, and rectangles, always.
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.
A square's opposite sides are parallel and all the sides are congruent.
parellelagram
Then, the opposite sides are congruent.
No. The congruent sides need not be parallel.
trapezoid
Parallel
true
Trapazoid
rhombus
It is a square or a rhombus
a square