A rectangle.
a square
A four-sided polygon with all sides congruent and with four right angles is a square.
A four-sided polygon with four congruent sides and four equal angles is a square
A parallelogram is a four sided figure. that has congruent angles and all sides are parallel
Square.
A four sided figure with four equal sides and no right angles is a diamond, or a rhombus. If it had four right angles, it would be a square.
A square is not a solid figure at all. It's a flat figure, with four congruent faces and four congruent angles.
A rectangle is a quadrilateral with opposite sides parallel and congruent and four right angles. If all four sides are congruent, it is a square.
A rectangle is a quadrilateral with opposite sides parallel and congruent and four right angles. If all four sides are congruent, it is a square.
a rhombus
A square.
It could be an irregular polygon with 5 or more sides or a rectangle or square.