问题描述：
As is shown in the following picture ,the side length of the square is 4cm.What is the area of ..
As is shown in the following picture ,the side length of the square is 4cm.What is the area of the shaded part?
翻译!快!
As is shown in the following picture ,the side length of the square is 4cm.What is the area of the shaded part?
翻译!快!
问题解答：
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