This quadrilateral is a trapezium. It is because it has the same properties as a trapezium will have. It has one pair of opposite sides which equal in length, the other pair not equal in length. It could not be a square or a rectangle as it does not have 4 right angles. It could not be a rhombus since it does not have 4 equal sides. It could not be a parallelogram as it does not have two pairs of parallel lines. It does not have two pairs of adjacent sides that have equal length, thus it could not be a kite.