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Yes... Anything that has straight sides and is closed is a polygon.
= Parallelograms look like rectangles, squares, and quadrilateral. =
No. A cube is a 3 dimensional object whereas a parallelogram is 2-dimensional.
Base times vertical height = b x h (same as rectangle).
A square is a parallelogram because, it has 4 sides. All parallelograms have 4 sides...
Area of a parallelogram is 'base multiplied to the PERPENDICULAR height. NOT the sloping height.
It has no volume because it's a 2D shape but its surface area is:- length*perpendicular height
Rectangles and squares are examples of parallelograms, as are rhombi. To be a parallelogram, the four-sided-polygon (quadrilateral) must have opposite sides parallel.