A 4 sided polygon is called a quadrilateral. Depending on where the two right angles are, would put the quadrilateral into different subsets. For example if the two right angles are on adjacent corners (and the other 2 angles are not right angles), then it is a trapezoid. If the 2 right angles are in opposite corners, and the other 2 angles are not right angles then it would be a kite-shaped quadrilateral.
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A shape with parallel sides but no right angles is called a parallelogram
Squares and rectangles have a two-dimensional shape with four sides and four right angles.
A rectangular shape, or a rectangle.
A right trapezoid.
Not possible ! If the shape has four right-angles, at least two sides must be the same length.