【Question 9】
As shown in the figure, four identical rectangles are arranged to form a large square with a side length of 10 cm, and a small square is formed in the middle. The perimeter of each rectangle is $\qquad$ cm.
【Analysis and Solution】
Cleverly find the perimeter.
The side length of the large square is equal to the sum of the length and width of the small rectangle; that is, the sum of the length and width of the small rectangle is 10 cm; the perimeter of each rectangle is $10 \times 2=20$ cm.