添加辅助线是几何解题中的重点和难点,不同的辅助线体现了不同的解题思路和方法,学生在解题时,往往被一条辅助线卡住,从而题目做不下去.现举一例说明辅助线与一题多解的内 Adding auxiliary lines is the key and difficult point in geometric problem solving. Different auxiliary lines embody different ideas and methods for solving problems. When students solve problems, they are often stuck by an auxiliary line, so the problem cannot be solved. Explain the auxiliary line and the solution to the problem