A rectangle is a four sided polygon with four right angles and two pairs of parallel side. [Equal sides is not required since it is implied by parallel and right angles].
A rectangle has 4 right angles and 2 pairs of parallel sides.
A trapezoid.A rhombus.
A square has 4 equal sides, 2 pairs of parallel sides and 4 right angles.
This is a parallelogram, opposite sides are of equal length and opposite angles are equal in size.
A sqare two pairs of parallel sides each corner is a right angle and all sides are equal.
A parallelogram has both pairs of opposite sides parallel but no right angles. A special kind of parallelogram is a rhombus which has all its sides of equal length