1. It is impossible to get it so that only a parallelogram is displayed. The reason for this is that all the attributes of a parallelogram are also the attributes of a rectangle, a rhombus, and a square. This is because the rectangle, rhombus, and square are all special cases of a parallelogram. This means they have all the attributes of a parallelogram and then some additional ones. For example, a parallelogram has four sides, 2 sets of equal sides, and 2 sets of parallel sides. A rectangle has all of these same properties with the additional one of having interior angles equal to 90°.