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新教材通过“复习巩固”、“综合运用”、拓广探索“三个子栏目展现,给我们的教学提供了方便,增强了练习的针对性,但在题目的具体设置上也时有不尽如人意的地方,以下通过9年级下册第28章的一道复习题,谈一下个人的认识,诚望交流.【题目】等腰△ABC的一个内角是30°,一条边长为23~(1/2),求△ABC的周长.【分析】本题看似简单,寥寥几语,道出了一个简中蕴繁的问
The new textbook through the ”Review Consolidation“, ”comprehensive use“, ”Exploring Exploring" three sub-sections to show, to our teaching provides a convenient and enhance the relevance of the practice, but the specific settings of the subject When there are unsatisfactory places, the following through the ninth grade volume Chapter 28 of a review questions, talk about personal understanding, sincere exchanges. 【Subject】 Isosceles △ ABC an angle of 30 °, one side length For the 23 ~ (1/2), find the circumference of ABC. [Analysis] This question may seem simple, very few words, come to a simple question