Let’s look at the following figures and their definitions.

• All of the patterns are quadrilaterals. 
• Although only b looks like a trapezium, c, d, e and f also fulfill the criteria of a trapezium. 
• The quadrilaterals c, d, e and f are parallelograms. 
• Figures d and f are rectangles. 

• Figures e and f are rhombuses. 

• The definition of a square is only seen in figure f.