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笔者参阅了100多份2005年全国中考试卷,并作了调查与统计,发现圆的知识在中考试卷中所占比例平均约为10%左右,有些省市的比例要超过30%.命题主要针对圆的认识;圆的对称与旋转不变性;垂径定理;同圆或等圆中,圆心角、弧、弦、弦心距之间的关系;圆周角定理及其推论等知识进行.而对与这些知识有关的实际问题的认识与解决也是新课程理念下中考命题的一个新亮点.命题形式一般是填空题、选择题或小型解答题.
I refer to more than 100 copies of the 2005 National Examination Paper and made surveys and statistics, found that the circle of knowledge in the examination paper, the average share of about 10%, and some provinces and cities to the proportion of more than 30%. Proposition mainly for Circle of understanding; circular symmetry and rotation invariance; vertical theorem; with the circle or circle, the central angle, arc, chord, chord center distance between the circle angle theorem and its corollary knowledge and so on Recognition and solution of practical problems related to these knowledge are also a new bright spot of senior high school entrance examination under the new curriculum concept.The propositional forms are generally fill in the blank, multiple choice questions or small answer questions.