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在新课程标准下,课堂教学要以培养人的发展为目标,指导学生通过自己的理解完成知识的建构,让开放性数学题走进课堂。在数学教学中,相似三角形的开放性问题占有重要的地位。一、相似三角形开放性问题的特点相似三角形开放性问题是相对于条件和结论明确的封闭题而言的,它的条件和问题变化不定型,或条件隐蔽,或结论不一,或需要自加条件自设求解问题,或有多重解
Under the new curriculum standard, classroom teaching should aim at training people’s development, instruct students to complete the construction of knowledge through their own understanding, and let the open math problems into the classroom. In mathematics teaching, the openness of similar triangles occupies an important position. First, the characteristics of the similar triangular open question Similar triangular open question is relative to the conditions and conclusions of the explicit closed question, its conditions and problems are not stable, or the conditions are hidden, or the conclusion is different, or need to add Conditions to solve problems, or multiple solutions