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有一正方形的纸板,边长为8cm,如果像图1那样分割成两个全等的直角梯形和两个全等的直角三角形,将两个直角梯形相互对接,两个直角三角形也对接起来,拼成图2所示的“三角形”.
There is a square cardboard with a side length of 8cm. If it is divided into two congruent right-angled trapezoids and two congruent right-angled triangles as in Figure 1, two right-angled trapezoids are butted against each other, and two right-angled triangles are also joined together. Figure 2 shows the “triangle”.