A trapezoid.
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 Quadrilateral.
A kite.
A trapezoid is a four-sided figure (or "quadrilateral") with only one pair of parallel sides.
parallelogram
A four sided figure with two pairs of parallel sides.
Square
A four-sided figure with two pairs of parallel sides the same length and four right angles is called a square.
A trapezoid is a four-sided figure with only one pair of parallel sides. A square will always have two pairs of parallel sides.
A trapezium.
A four sided figure with two pairs of parallel sides.
A trapezoid is a quadrilateral which has two parallel sides.