The diagram shows a square and an isosceles triangle. The square has sides of length $$\(6 \mathrm{~cm}\)$$. The base of the isosceles triangle is $$\(6 \mathrm{~cm}\)$$. The perimeter of the square is equal to the perimeter of the isosceles triangle. The shaded shape is made by putting three of the isosceles triangles around the square as shown in the diagram below. Work out the perimeter of the shaded shape. Show your working clearly. $$\(\mathrm{cm}\)$$

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