求弧长公式是什么是不是L=n/180乘派(圆周率3.14)乘r然后帮我做下这些题:1.有个圆形铁丝圈周长为40厘米,小明剪下圆心角为108°的一段弧形铁丝,那么剪下的铁丝长为多少2.一直一套沪场56
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![求弧长公式是什么是不是L=n/180乘派(圆周率3.14)乘r然后帮我做下这些题:1.有个圆形铁丝圈周长为40厘米,小明剪下圆心角为108°的一段弧形铁丝,那么剪下的铁丝长为多少2.一直一套沪场56](/uploads/image/z/4336672-40-2.jpg?t=%E6%B1%82%E5%BC%A7%E9%95%BF%E5%85%AC%E5%BC%8F%E6%98%AF%E4%BB%80%E4%B9%88%E6%98%AF%E4%B8%8D%E6%98%AFL%3Dn%2F180%E4%B9%98%E6%B4%BE%EF%BC%88%E5%9C%86%E5%91%A8%E7%8E%873.14%EF%BC%89%E4%B9%98r%E7%84%B6%E5%90%8E%E5%B8%AE%E6%88%91%E5%81%9A%E4%B8%8B%E8%BF%99%E4%BA%9B%E9%A2%98%EF%BC%9A1.%E6%9C%89%E4%B8%AA%E5%9C%86%E5%BD%A2%E9%93%81%E4%B8%9D%E5%9C%88%E5%91%A8%E9%95%BF%E4%B8%BA40%E5%8E%98%E7%B1%B3%EF%BC%8C%E5%B0%8F%E6%98%8E%E5%89%AA%E4%B8%8B%E5%9C%86%E5%BF%83%E8%A7%92%E4%B8%BA108%C2%B0%E7%9A%84%E4%B8%80%E6%AE%B5%E5%BC%A7%E5%BD%A2%E9%93%81%E4%B8%9D%EF%BC%8C%E9%82%A3%E4%B9%88%E5%89%AA%E4%B8%8B%E7%9A%84%E9%93%81%E4%B8%9D%E9%95%BF%E4%B8%BA%E5%A4%9A%E5%B0%912.%E4%B8%80%E7%9B%B4%E4%B8%80%E5%A5%97%E6%B2%AA%E5%9C%BA56)
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