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2016年重庆中考数学B卷中的第18题是一道几何填空压轴题,是一道奇异题,题干很简洁,但设计别出心裁,思维含量高,颇有难度,思路开阔,解法灵活多样,给学生以无限的思考探索空间.据阅卷场反馈信息,答对该题的考生极少,平均分(满分4分)和得分率偏低.究其原因,解答此题需要添加多条辅助线,通过辅助线的铺路搭桥作用将复杂的图形转化为基本模型图形,但是很多考生由于没有抓住添加辅助线的关键
In 2016 Chongqing exam math B volume 18 is a geometric fill in the blank finale, is a strange problem, the title is very simple, but the design ingenuity, high thinking content, quite difficult, open-minded, flexible solution, to the students With unlimited thinking to explore the space.According to the reading field feedback information, answer the question candidates rarely, the average score (out of 4) and the score is low.Research reasons, answer this question need to add more auxiliary lines, through the auxiliary Paving the way to bridge the complex graphics into the basic model graphics, but many candidates did not grasp the key to add auxiliary line