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培养学生的创新精神和实践能力已成为教育的重要方面,全国各地的中考试题也相应地出现了许多开放性题目,其命题形式改变了过去“已知……求证……”的固定模式,这有利于考查同学们的探索精神.现以与平行四边形有关的中考开放题为例进行分析说明.一、条件补充型例1(2003·镇江)在四边形ABCD中,已知AB∥CD,请补充条件(写一个即可),使得四边形ABCD为平行四边形.
Cultivating students’ innovative spirit and practical ability has become an important aspect of education. Many open questions have appeared correspondingly in the mid-level test questions across the country. The propositional format has changed the fixed pattern of the past “knowledge...proof...”. , This is conducive to the exploration of the spirit of the students’ exploration. Now the analysis and explanation of the open question in the entrance examination related to the parallelogram is taken as an example. I. Conditional Supplementary Example 1 (2003 Zhenjiang) In the quadrilateral ABCD, known as AB∥CD, Please add conditions (write one) so that quadrilateral ABCD is a parallelogram.