3.Explain how a square is
(i) a quadrilateral

(ii) a parallelogram

(iii) a rhombus

(iv) a rectangle

(i) Square is a quadrilateral because it is a closed polygon with four line segments.
(ii) Square is a parallelogram because the opposite sides are equal and parallel and also opposite angles are equal.

(iii) Square is a rhombus because its opposite sides are parallel and all the sides are equal.

(iv) Square is a rectangle because its opposite sides are equal and have equal diagonal.