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考题20 图形的初步认知考试动向图形的初步认识在中考中主要是对概念、定义的考查,题型为填空和选择题,所占分值比例为3%～5%,难度不大,在简单的计算、证明和综合题中,也常作为考点出现.难点疑点1.三种基本图形——线段、射线、直线的理解.2.三类角——余角、补角、对顶角的理解.3.直线平行、垂直的条件和有关性质的理解.4.初步认识空间图形,进行平面图形与空间几何体相互转
Test 20 Initial Recognition of the test pattern Preliminary understanding of the test pattern In the senior high school entrance examination is the concept of the definition of the test questions for the fill in the blank and multiple choice, the proportion of 3% to 5%, not difficult, in the Simple calculation, proof and synthesis of questions, but also often as a test site. Difficult point doubts 1. Three basic graphics - line, ray, line of understanding .2. Understanding .3 straight line parallel, vertical conditions and the understanding of the nature of the relationship .4 preliminary understanding of space graphics, graphics and spatial geometry to each other