It's a rectangle because it has four sides which is more than three sides,it also has less than five vertices, so it must be a quadrilateral.It is a rectangle because not all the sides are the same there are only two pairs of equal,parallel sides.It is a rectangle because it is not a pentagon because instead of five sides five vertices it has four sides four vertices.It is a rectangle because it has exactly two sides of symmetry. In addition to that it is a rectangle because it has it has right angles.
It can't be a trapezium because it only has one line of symmetry.It can't be a triangle because it needs more than three sides.It can't be a hexagon because it has more than five vertices.It can't be a square because all the sides are equal. It can't be a heptagon because it needs fewer than five vertices.It can't be a kite because there is only one line of symmetry.It can't be a circle or a semi circle because there are no right angles.It can't be a parallelogram because there is no symmetry.It can't be an octagon because It needs exactly one line of symmetry when it has eight.It cant be a nonagon or a decagon because it needs at least one right angle.