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在平面几何的证明中,往往需要添加辅助线帮助同学们解决问题,某些几何问题可以根据其特点构造辅助圆,根据圆的有关性质,使问题化难为易,现举几例加以说明。
In the proof of plane geometry, it is often necessary to add auxiliary lines to help students solve problems. Some geometric problems can construct auxiliary circles according to their characteristics. According to the relevant nature of the circle, it is difficult to make the problem easier. Here are a few examples to illustrate.