求这个图形的周长.怎么算的要详细点,最好有图说明怎么算的谢谢
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![求这个图形的周长.怎么算的要详细点,最好有图说明怎么算的谢谢](/uploads/image/z/6084423-63-3.jpg?t=%E6%B1%82%E8%BF%99%E4%B8%AA%E5%9B%BE%E5%BD%A2%E7%9A%84%E5%91%A8%E9%95%BF.%E6%80%8E%E4%B9%88%E7%AE%97%E7%9A%84%E8%A6%81%E8%AF%A6%E7%BB%86%E7%82%B9%2C%E6%9C%80%E5%A5%BD%E6%9C%89%E5%9B%BE%E8%AF%B4%E6%98%8E%E6%80%8E%E4%B9%88%E7%AE%97%E7%9A%84%E8%B0%A2%E8%B0%A2)
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