Square: they have four even sides, all the sides are closed, all the corners are right angles, it is a parallelogram.
Trapezoid: It has one pair of parallel sides, it is made up of 4 different sized lines, it is a closed shape, they are made up of right and obtuse angles.
Parallelogram: it has 2 pairs of parallel sides, it represents all the other shapes that are parallel, it is a closed shape, it has four sides.