矩形
中,E,F分别在边
,
上,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f79997547fb75e88ad1e2c66989a4a0.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d74a774eb8479d24b891e358761d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4187a861d1c558ee70701fc501f58842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc3d4ccf37116ee0394ca2058dce874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f79997547fb75e88ad1e2c66989a4a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/24/fc87ca93-e844-4f36-a959-849f29234ff5.jpg?resizew=141)
更新时间:2023-10-24 21:39:34
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【推荐1】如图,在
中,
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,
于点D,
交
于点E,若
,
,则a与b之间的数量关系是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
【推荐2】如图,过直线
上的点
作
,交x轴于点
,过点
作
轴.交直线l于点
;过点
作
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作
轴,交直线l于点
;……按照此方法继续作下去,若
,则线段
的长度为______ .(结果用含正整数n的代数式表示)
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【推荐2】如图,直线OD与x轴所夹的锐角为30°,OA1的长为1,△A1A2B1、△A2A3B2、△A3A4B3、…、△AnAn+1Bn均为等边三角形,点A1、A2、A3、…、An+1在x轴的正半轴上依次排列,点B1、B2、B3、…、Bn在直线OD上依次排列,那么B2019的坐标为_____ .
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【推荐1】如图,在矩形
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【推荐2】如图,在矩形ABCD中,∠BCD的角平分线CE与边AD交于点E,∠AEC的角平分线与边CB的延长线交于点G,与边AB交于点F,如果AB=
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【推荐1】如图,点A,C,D均在
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