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Sagot :

Answer:

30cm

Step-by-step explanation:

Lets consider rectangle 1 and 2 as the top and bottom horizontal ones and rectangle 3 as the vertical one.

The rectangle 1 and 2 align to form a side with total length of 6cm and rectangle 2 and 3 align to form a side with length 9cm.

So perimeter of the bigger rectangle is Perimeter= 2(l+b) = 2(6+9) = 30cm