1.边长为3cm,与5cm的两个正方形并排放在一起,在大正方形中画一段,以它一个顶点为圆心边长为半径的圆弧,求阴影部分的面积.2.如图,4个圆的半径都为a,求阴影部分的面积.图画得不好
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![1.边长为3cm,与5cm的两个正方形并排放在一起,在大正方形中画一段,以它一个顶点为圆心边长为半径的圆弧,求阴影部分的面积.2.如图,4个圆的半径都为a,求阴影部分的面积.图画得不好](/uploads/image/z/4521709-37-9.jpg?t=1.%E8%BE%B9%E9%95%BF%E4%B8%BA3cm%2C%E4%B8%8E5cm%E7%9A%84%E4%B8%A4%E4%B8%AA%E6%AD%A3%E6%96%B9%E5%BD%A2%E5%B9%B6%E6%8E%92%E6%94%BE%E5%9C%A8%E4%B8%80%E8%B5%B7%2C%E5%9C%A8%E5%A4%A7%E6%AD%A3%E6%96%B9%E5%BD%A2%E4%B8%AD%E7%94%BB%E4%B8%80%E6%AE%B5%2C%E4%BB%A5%E5%AE%83%E4%B8%80%E4%B8%AA%E9%A1%B6%E7%82%B9%E4%B8%BA%E5%9C%86%E5%BF%83%E8%BE%B9%E9%95%BF%E4%B8%BA%E5%8D%8A%E5%BE%84%E7%9A%84%E5%9C%86%E5%BC%A7%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.2.%E5%A6%82%E5%9B%BE%2C4%E4%B8%AA%E5%9C%86%E7%9A%84%E5%8D%8A%E5%BE%84%E9%83%BD%E4%B8%BAa%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.%E5%9B%BE%E7%94%BB%E5%BE%97%E4%B8%8D%E5%A5%BD)
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