The diagram shows four identical circles drawn inside a square. Diagram NOT accurately drawn Each circle touches two other circles and two sides of the square. The region inside the square that is outside the circles, shown shaded in the diagram, has a total area of $$\(40 \mathrm{~cm}^{2}\)$$ Work out the perimeter of the square. Give your answer correct to 3 significant figures. $$\(\mathrm{cm}\)$$

Answer:

Knowledge points:

Solution: