Figure 18-48 is composed of five square pieces of paper of the same size. Please cut two pieces of paper on the figure and then make a square

Let each area be 1 * 1
So the total area is 5
So the side length of the square is & nbsp; & nbsp; & nbsp; root sign & nbsp; 5
Because 2 ^ 2 & nbsp; + & nbsp; 1 ^ 2 & nbsp; = 5
So there's a tangent like this

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