give reason:
square also a paralellogram
a rectangle can be thought as a speacial paralellogram
square, rectangles, paralellograms are all quadrilaterals
a square can be thought of as a special rhombus

1. Square is a special type of a parallelogram whose all the sides are equal and all the angles measure 90°.

2. Rectangle is also a special type of a parallelogram whose opposite sides are equal and all the angles measure 90°.

3. Squares, rectangles and parallelograms are all quadrilaterals as each of this figure is a polygon of four sides. 

4. A rhombus is a parallelogram whose all the sides and opposite angles are equal. Yes, a square is a special type of a rhombus whose all the angles are equal and measures 90°.