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在动态问题中求解最值是近几年中考的一大热点.本文结合部分与圆相关的最值问题具体谈谈如何巧添辅助圆,顺利求解最值问题.例1如图1(1),在Rt△ABC中,∠ACB=90°,AC=4,BC=6,点D是边BC的中点,点E是边AB上的任意一点(点E不与点B重合),沿DE翻折△DBE使点B落在点F处,连接AF,则线段AF长的最小值是
In the dynamic problem of solving the most value is a hot spot in the last years of the senior high school entrance examination.This paper combines some of the most relevant problems with the circle specifically talk about how to assist the circle, smooth solving the most value problem.Example 1 As shown in Figure 1 (1) In Rt △ ABC, ∠ACB = 90 °, AC = 4, BC = 6, point D is the midpoint of edge BC, point E is any point on edge AB (point E does not coincide with point B) DE fold △ DBE so that the point B falls at point F, connecting AF, the minimum length of the line segment AF is