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一、中考命题热点相似三角形历年中考热点:一是相似三角形的判定;二是利用相似三角形的性质解题;三是相似三角形有关的综合题.以上试题有两个基本特征:一是体现开放探究性;二是注重综合,在今后的中考相似三角形试题中,将进一步突显新课标理念.二、典型考题评析1.相似三角形的判定例1如图1,在△ABC中,AC>AB,点D在AC边上(不与A、C点重合),若再增加一个条件就能使△ABD∽△ACB,则这个条件可以是____.评析:在△ABD和△ACB中,∠A=∠A,故需填∠ABD=∠C或∠ADB=∠ABC或AD/AB=AB/AC,
First, the examination proposition hot points similar to the calendar year examination hotspot: First, the determination of similar triangles; Second, the use of the nature of similar triangles to solve problems; Third, similar questions related to the triangle. The above questions have two basic characteristics: First, reflect the open inquiry The second is to focus on synthesis, in the future of the similar exam questions in the exam, will further highlight the concept of the new curriculum. Second, the typical evaluation of the test 1. Similar to the triangle of the judgment example 1 in Figure 1, in △ ABC, AC> AB, Point D is on the AC side (not coincident with points A and C). If one more condition is added, △ABD∽ΔACB can be made. This condition can be ____. Comment: In ΔABD and △ACB, ∠A =∠A, so you need to fill in ABD=∠C or ∠ADB=∠ABC or AD/AB=AB/AC,