全等三角形是初中数学的重点内容,在各地中考试卷中都占有一定的分量,特别是开放型的全等问题更受命题者关注,它对培养和考查学生的双基和发散思维能力大有裨益.现例举近两年中考题加以归类浅析,希望对同学们有所启发.一、条件开放题图1例1(2004年四川省)如图1,已知点C是∠AOB Congruent triangles are the key content of junior high school mathematics. They occupy a certain amount of weight in various examination papers. Especially the open-minded and equal questions are more concerned by the propositionaries. It has great ability to train and examine students’ dual-base and divergent thinking. Benefits. Present examples cited in the past two years to be categorized and analyzed, hope to be inspired to the students. First, conditional open questions Figure 1 Example 1 (Sichuan Province in 2004) Figure 1, the known point C is ∠AOB