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It is a parallelogramIf one of the angles is a right angle (then they all are) and the quadrilateral is a rectangle.If both pairs of sides are equal in length (but none of the angles is a right angle) the quadrilateral is a rhombus.If the sides are equal and one of the angles is a right angle, the quadrilateral is a square.
A square
rectangle
It's impossible for a quadrilateral to have no equal sides and have right angles.
A regular quadrilateral. A plane shape with four sides which are equal in length and which meet at right angles.