【Question 10】Using identical rectangles that are 9 cm long and 3 cm wide to form the shape shown below, the perimeter of the resulting figure is $\qquad$ cm.



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By translation, a rectangle with a length of $9 \times 8=72$ cm and a width of $3 \times 4=12$ can be obtained, plus 2 sides of $3 \times 2=6$ cm each, so the perimeter is $(72+12) \times 2+6 \times 2=180(\mathrm{~cm})$