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 figure with no equal sides is an irregular quadrilateral.
Square
Trapezoid
Ah, a trapezium is a special shape that has one pair of parallel sides. The other two sides are not parallel and can be different lengths. It's like a unique friend in the world of shapes, bringing its own special charm to the geometric family. Just remember, even if it's different from the others, it's still a beautiful shape worth appreciating.
A non-descript four sided figure is a quadrilateral.
Rhombus(diamond)
A Rhombus
Yes. It would be a square.
-- trapezoid -- kite -- four-sided figure with no two equal sides
A square.
A four sided figure with no parallel sides is a trapezium, but it is also an irregular four-sided polygon, tetragon, quadrilateral, or quadrangle.