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1设计说明1.1学情分析(1)针对九年级基础复习阶段,学生前面已将相关知识点进行了了初步的梳理,到了平移与旋转复习内容时,教师可以进行适当的整合;(2)在平移、旋转背景下进行问题的自然变式,并引导学生学会设计问题,重点是平移、旋转前后图形能完全重合(是全等形),难点是旋转前后对应关系的探究。1.2设计思想(1)由一幅三角板(两个重要的特殊直角三角形)出发,分别通过平移、旋转变换生成一系列变式问题,
1 Design Description 1.1 Analysis of Academic Situation (1) For the ninth grade basic review stage, the students have sorted out the relevant knowledge points in advance, and the teachers can make proper integration when they translate and revise the contents. (2) Translation and rotation of the problem of natural variations, and guide students to learn to design problems, the focus is on the translation, before and after the rotation of the graphics can be completely coincident (is the congruent), the difficulty is to explore the relationship between the rotation before and after. 1.2 Design Ideas (1) Starting from a set square (two important special right-angled triangles), a series of variant problems are generated by translation and rotation respectively.