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Answer :

Answer:

12 ft

Step-by-step explanation:

square root of 324 = 18

Side =18   18x18= 324

    18/3 = 6

    6x2=12

side small = 12

                  18x4 = 72 (perimeter big)

                   12x4 =48 (perimeter small)

      2:3

    48:72