1.用边长为12厘米的正方形纸,剪一个最大的圆,那么这个圆的半经为( )厘米,直经为( )厘米,周长为( )厘米2.用一张长为9厘米,宽为5厘米的长方形纸剪一个最大的圆,那么这个圆的半经为( )厘米,
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![1.用边长为12厘米的正方形纸,剪一个最大的圆,那么这个圆的半经为( )厘米,直经为( )厘米,周长为( )厘米2.用一张长为9厘米,宽为5厘米的长方形纸剪一个最大的圆,那么这个圆的半经为( )厘米,](/uploads/image/z/8682958-46-8.jpg?t=1.%E7%94%A8%E8%BE%B9%E9%95%BF%E4%B8%BA12%E5%8E%98%E7%B1%B3%E7%9A%84%E6%AD%A3%E6%96%B9%E5%BD%A2%E7%BA%B8%2C%E5%89%AA%E4%B8%80%E4%B8%AA%E6%9C%80%E5%A4%A7%E7%9A%84%E5%9C%86%2C%E9%82%A3%E4%B9%88%E8%BF%99%E4%B8%AA%E5%9C%86%E7%9A%84%E5%8D%8A%E7%BB%8F%E4%B8%BA%28+%29%E5%8E%98%E7%B1%B3%2C%E7%9B%B4%E7%BB%8F%E4%B8%BA%28+%29%E5%8E%98%E7%B1%B3%2C%E5%91%A8%E9%95%BF%E4%B8%BA%EF%BC%88+%EF%BC%89%E5%8E%98%E7%B1%B32.%E7%94%A8%E4%B8%80%E5%BC%A0%E9%95%BF%E4%B8%BA9%E5%8E%98%E7%B1%B3%2C%E5%AE%BD%E4%B8%BA5%E5%8E%98%E7%B1%B3%E7%9A%84%E9%95%BF%E6%96%B9%E5%BD%A2%E7%BA%B8%E5%89%AA%E4%B8%80%E4%B8%AA%E6%9C%80%E5%A4%A7%E7%9A%84%E5%9C%86%2C%E9%82%A3%E4%B9%88%E8%BF%99%E4%B8%AA%E5%9C%86%E7%9A%84%E5%8D%8A%E7%BB%8F%E4%B8%BA%28+%29%E5%8E%98%E7%B1%B3%2C)
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