论文部分内容阅读
折叠问题是中考的一个热点,有效考查学生的空间想象能力、动手操作能力.因此,倍受命题者青睐.笔者在研究2015年各地的数学中考试卷,发现江苏省淮安市中考卷的第27题是以“新定义”型的一道折叠题,引人入胜,探究味浓,尤其是第(4)小题,可从勾股定理、全等三角形、相似三角形、三角函数不同角度出发都有很好的解决问题的方法,巧添辅助线,解法更多样.一、试题及赏析阅读理解:如图1,如果四边形ABCD满足AB=AD,CB=
Folding problem is a hot spot in the exam, an effective examination of students’ spatial imagination, hands-on ability.Thus, much favored by the proponents.I study in 2015 around the mathematics exam papers and found that Jiangsu Province, Huaian City, the 27th test paper Is based on the “new definition” type of a folding, fascinating, to explore the flavor, especially small problems (4), from the Pythagorean theorem, congruent triangles, similar triangles, trigonometric functions have different angles A good solution to the problem, clever Tim auxiliary line, the solution is more diverse. First, the test questions and appreciation Reading comprehension: Figure 1, if the quadrilateral ABCD meet AB = AD, CB =