谁可以总结一下初中数学几何题做辅助线的规律(北师大教科书)?请回答.
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![谁可以总结一下初中数学几何题做辅助线的规律(北师大教科书)?请回答.](/uploads/image/z/3957520-40-0.jpg?t=%E8%B0%81%E5%8F%AF%E4%BB%A5%E6%80%BB%E7%BB%93%E4%B8%80%E4%B8%8B%E5%88%9D%E4%B8%AD%E6%95%B0%E5%AD%A6%E5%87%A0%E4%BD%95%E9%A2%98%E5%81%9A%E8%BE%85%E5%8A%A9%E7%BA%BF%E7%9A%84%E8%A7%84%E5%BE%8B%28%E5%8C%97%E5%B8%88%E5%A4%A7%E6%95%99%E7%A7%91%E4%B9%A6%29%3F%E8%AF%B7%E5%9B%9E%E7%AD%94.)
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