在近几年的中考试卷中,全等三角形方面常出现开放性题目.这类题目有些还有点儿难度.下面精选几题,供大家学习时参考.一、补充条件型例1(深圳)如图1,在ΔABC和ΔDCB中,AC=DB.若不增加任何字母与辅助线,要使ΔABC≌ΔDCB,则还需要增加的一个条件是______.解:根据“边角边”可填∠ACB=∠DBC, In recent years in the examination papers, congruent triangles often appear open topic .This kind of topic somewhat a bit difficult.Select a few questions below, for everyone to learn reference .A Supplementary Condition Example 1 (Shenzhen) As shown in Figure 1, ΔABC and ΔDCB, AC = DB. If you do not add any letters and auxiliary lines, to make ΔABC≌ΔDCB, then you need to add a condition is ______. Solution: According to the “edge” Can fill ∠ ACB = ∠ DBC,