大小两个半圆,直径在同一条直线上,弦AB与小圆相切,且与直径平行,弦AB长16cm,求阴影部分的面积这是图
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![大小两个半圆,直径在同一条直线上,弦AB与小圆相切,且与直径平行,弦AB长16cm,求阴影部分的面积这是图](/uploads/image/z/4530741-69-1.jpg?t=%E5%A4%A7%E5%B0%8F%E4%B8%A4%E4%B8%AA%E5%8D%8A%E5%9C%86%2C%E7%9B%B4%E5%BE%84%E5%9C%A8%E5%90%8C%E4%B8%80%E6%9D%A1%E7%9B%B4%E7%BA%BF%E4%B8%8A%2C%E5%BC%A6AB%E4%B8%8E%E5%B0%8F%E5%9C%86%E7%9B%B8%E5%88%87%2C%E4%B8%94%E4%B8%8E%E7%9B%B4%E5%BE%84%E5%B9%B3%E8%A1%8C%2C%E5%BC%A6AB%E9%95%BF16cm%2C%E6%B1%82%E9%98%B4%E5%BD%B1%E9%83%A8%E5%88%86%E7%9A%84%E9%9D%A2%E7%A7%AF%E8%BF%99%E6%98%AF%E5%9B%BE)
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