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1999年天津市中考数学试卷中第29题是作图题: 请找出下图中圆的圆心,并写出你找圆心的方法.(不要求证明)(原题图见本期第39页) 从考生们考后的谈话中可以体会到这道题出得很活,它考查了不同层次的考生运用知识解决实际问题的能力。这里既有对圆的有关性质定理的理解,又有对基本作图内容的考查,现将图形略去,谈一谈学生的不同解法及其分析。
In 1999, the 29th question in the Tianjin Mathematical Examination Questionnaire is a drawing question: Please find out the circle’s center of the circle in the picture below, and write out the method for finding the center of the circle. (Do not require proof) (The original picture is shown on page 39 of this issue.) ) Candidates from the post-test interviews can feel that this question is very lively. It examines the ability of different levels of candidates to use knowledge to solve practical problems. Here both the understanding of the theorem of the relevant nature of the circle, but also the examination of the contents of the basic drawing, will now be omitted, talk about the students’ different solutions and analysis.