Rhombus, actually all the lines are parallel even though it is an offset square. what you want is a trapezoid or some variation there of.
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A four sided figure with no parallel sides is a trapezium, but it is also an irregular four-sided polygon, tetragon, quadrilateral, or quadrangle.
A four-sided polygon with opposite sides parallel could be a square, a rectangle, or a rhombus.If it has one pair of opposite, parallel sides, then it is a trapezoid. If it has two pairs of opposite, parallel sides, then it is a parallelogram.
Any polygon with four or more sides can have perpendicular and parallel lines.
trapezoid
An irregular quadrilateral.