Length of the rectangle `ABCD =9cm` Breadth of the rectangle `=5cm` Side of the square `III =5cm` Side of the square `I=9-5=4cm` Side of the square `II=5-4=1cm` Lenght of the shaded region `=4-1=3cm` Breadth of the shaded region `=3xx1=3sq.cm` Area of the shaded region `=3xx1=3sq.cm`