I don't think there's any special name for this.
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a quadrilateral is a shape with four equal sides.
a rhombus* * * * *No, a rhombus has two pairs of parallel sides. A trapezium has only one pair.Trapezoid
If a quadrilateral has two pairs of opposite congruent sides, then the quadrilateral is a parallelogram.
A trapezium is a quadrilateral with two parallel lines.
The only terms that definitely apply are "quadrilateral" (or more specifically an "incongruent quadrilateral") and "quadrangle."The polygon may also be a trapezoid or a trapezium, but it is also possible to have a trapezoid or trapezium with two sides equal. Also note that the British and American definitions of trapezoid and trapezium are exactly reversed: an American trapezoid is a British trapezium, and a British trapezoid is an American trapezium.A polygon with 4 sides is called a quadrilateral. There is no special name to indicate that it has no two equal sides.