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考点聚焦图形与证明在初中数学中地位很重要,是历年来考试必不可少的一部分.今选择近年来在中考中出现的有代表性的试题,与初三同学一起共勉.热点透视热点1:紧扣三角形全等的判定,考查三角形全等的开放型问题.例1(2009安徽)如图1,在正五边形ABCDE中,连结对角线AC,AD和CE,AD交CE于F.(1)请列出图中两对全等三角形;(2)请选择所列举的一对全等三角形加以证明.分析解决本题关键是充分依据图形,通过准确找出全等三角形的对应元素,证明三角形全
Test centers to focus on graphics and proof of status in junior high school mathematics is very important, is an essential part of the examination over the years .This choice in recent years in the test in the representative questions, with the junior high school students to encourage each. Example 1 (2009 Anhui) As shown in Figure 1, in the regular pentagon ABCDE, the connection diagonal AC, AD and CE, AD pay CE in F (1) Please list the two pairs of congruent triangles in the picture, (2) Please select the enumerated pair of congruent triangles to prove.The key to analyze and solve this problem is to make full use of the graph, by accurately finding the corresponding elements of the congruent triangle Prove the triangle