It is a rectangle that fits the given description.
They are the pairs of sides which are parallel.
A rhombus.
square
A rhombus has 4 sides of equal length, opposing parallel sides, and no right angles
A regular rectangle is a quadrilateral with 2 pairs of parallel sides, the pairs of parallel sides are the same length but they are different to the other pair of parallel sides. * * * * * The above definition is not specific enough: it could apply to any parallelogram. It is also a requirement that all its interior angles are right angles.
A TRAPEZIUM. Trapezia can be SYMMETRIC or ASSYMETRIC. That is Non-parallel sides can be of the same length or of different lengths/ intersext at different angles to the parallel lines.
A Rectangle
A quadrilateral with 4 right angles and opposite sides that are parallel can be either a rectangle if the adjacent sides are of different length or a square if the adjacent sides are of the same length.
A shape with opposite sides parallel and of the same length and four right angles is a rectangle.
A square has 3 sets of parallel sides of equal length AND all the angles are 90 degrees. A rhombus has 2 sets of parallel lines of equal length, but the angles aren't all 90 degrees.
A Rhombus
square
It is a quadrilateral that has 2 parallel sides of different lengths and 2 sides of equal length with base angles being equal
They are the pairs of sides which are parallel.
A rhombus.
square
A Rhombus had 2 pairs of parallel sides and has NO right angles. :)