中考数学证明线段相等的基本思路

• 作 者: 陈锡志
• 出 处: 第二课堂(初中)
• 发表日期: 2012年06期
• 关键词: 数学证明 全等三角形 对应边 等腰梯形 弦心距 平分线 已知条件 等弧 陈锡 山东临沂

证明线段相等是中考数学中的常考题型,这里我们以2011年中考题为例说明证明线段相等的几种基本思路,供同学们参考.一、运用全等三角形设法证明两线段所在的两个三角形全等,其对应边就相等,这是证明线段相等的最基本的思路.例1(北京卷)如图1,点A、C、B、D在同一

Prove that the same line segment is a common test questions in the math test, here we take 2011 exam questions as an example to prove that the line is equal to several basic ideas for the students to reference. First, the use of congruent triangles to prove that two lines where the two Triangle congruent, its corresponding edge is equal, this is the most basic line of thought to prove that the line segment is equal Example 1 (Beijing volume) As shown in Figure 1, points A, C, B, D in the same