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许多中考试题都是以教材的例题、习题为背景,经过命题专家巧妙构思编拟而成.中考试题的权威性和导向性是由命题专家独具匠心精心打造的,其思路和方法常具有类比迁移和拓广探索性.因此,教师在教学中若能引导学生提炼出基本几何模型,用基本几何模型解决问题,则能提高学习效率,提升创新创造能力.一、中考试题呈现和探源题目(2016年赤峰中考题)如图1,正方形ABCD的边长为3 cm,P、Q分别从B、A出
Many senior high school entrance examination questions are based on the textbook examples, exercises as the background, after the proposition experts cleverly prepared and compiled.Papers and authoritativeness of the examination questions by the proposition expert ingenuity carefully crafted, and its ideas and methods often have analogy to migrate and Therefore, teachers in guiding teaching students to extract the basic geometric model, the basic geometric model to solve the problem, you can improve learning efficiency and enhance innovation and creativity. Year Chifeng test questions) as shown in Figure 1, the side of the square ABCD is 3 cm, P, Q from B, A