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专题26 比例线段与平行线分线段成比例考试动向平行线分线段成比例,是数学中的基本知识点,是相似三角形的基础,也是历年来中考的基本考查内容之一,试题以多种形式呈现,占全卷分值的2%左右,如2005中考重庆、南京卷约占3%.考查重点是比例式的证明、利用比例求线段长、证明线段平行,总的趋势是要求有所降低,突出应用和对转化等思想的考查。
Topic 26 Proportional line segment and parallel to the line segment proportional to the proportion of examinations parallel to the line segment is proportional to the basic knowledge in mathematics is the basis of similar triangles, but also over the years in one of the basic test examination, test questions in various forms Accounting for about 2% of the total score, such as Chongqing in 2005 test, Nanjing volume accounts for about 3% .Examination focused on the proof of proportion, the use of proportion to find the line length, line segments prove parallel, the general trend is to reduce the requirements , Highlighting the application and the conversion of thinking and other tests.