This shape is simply a quadrilateral. It cannot be square because it does not have four equal sides. It cannot be a rectangle because it does not have two sides that are the same length and because it doesn't have 2 pairs of parallel lines. It cannot be a trapezoid because it does not have 1 pair of parallel lines. It cannot be a triangle because it does not have 3 vertices. Lastly, this shape is not a parallelogram because it does not have 2 pairs of parallel lines.
ANSWER : QUADRILATERAL