如图,有一块直角三角形纸片,两直角边AC=30cm,BC=40cm,现将直角边AC沿直线AD折叠,使它落在斜边AB上,
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![如图,有一块直角三角形纸片,两直角边AC=30cm,BC=40cm,现将直角边AC沿直线AD折叠,使它落在斜边AB上,](/uploads/image/z/3848386-58-6.jpg?t=%E5%A6%82%E5%9B%BE%2C%E6%9C%89%E4%B8%80%E5%9D%97%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%E7%BA%B8%E7%89%87%2C%E4%B8%A4%E7%9B%B4%E8%A7%92%E8%BE%B9AC%3D30cm%2CBC%3D40cm%2C%E7%8E%B0%E5%B0%86%E7%9B%B4%E8%A7%92%E8%BE%B9AC%E6%B2%BF%E7%9B%B4%E7%BA%BFAD%E6%8A%98%E5%8F%A0%2C%E4%BD%BF%E5%AE%83%E8%90%BD%E5%9C%A8%E6%96%9C%E8%BE%B9AB%E4%B8%8A%2C)
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