A right [angled] trapezium.
That is a rectangle.
a square which is a subset of rectangles
A rectangle can be any four-sided plane figure with four right angles, including a four-sided polygon, a quadrilateral, a rhombus, a quadrangle, and a right-angled parallelogram,
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 four-sided polygon with all sides congruent and with four right angles is a square.
A right trapezoid is a four-sided polygon with two right angles and two parallel sides.
A four-sided polygon with four right angles is a rectangle. If the four sides are congruent, it is a special case of a rectangle called a square.
The sum of the interior angles of a four-sided polygon is 360 degrees.
a rhombus
A right [angled] trapezium.
A parallelogram is a four sided polygon with opposing parallel sides of equal length. Then if it has four right angles, the polygon becomes a rectangle.
square or rectangle.
A four-sided polygon with all sides equal and no right angles would be a rhombus. A rhombus consists of two acute angles and to obtuse angles.
A quadrilateral is a 4 sided polygon with four angles.
A rhombus or a parallelogram
A pallelogram or rhombus