如图所示,公路BC所在的直线恰为AD的垂直平分线,则下列说法中:①小明从家到书店与小颖从家到书店一样远;②小明从家到书店与从家到学校一样远;③小颖从家到书店与从家到学校一样远;④小明从家到学校与小颖从家到学校一样远.正确的是__ .(填写序号)
![](https://img.xkw.com/dksih/QBM/2019/2/28/2150477348274176/2152999699439617/STEM/eb6ddda48e6f43e69de7e8dfd63a2e09.png?resizew=132)
18-19七年级下·全国·课后作业 查看更多[2]
更新时间:2019-03-08 10:03:27
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【推荐1】已知:如图,点
在线段
外,且
,求证:点
在线段
的垂直平分线上,在证明该结论时,需添加辅助线,则下列作法正确的是________ .
①作
的平分线
交
于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②过点
作
于点
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
③取
中点
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
④过点
作
,垂足为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e4b16c2c6c9bd089da78122e9d2511.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
③取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
④过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e4b16c2c6c9bd089da78122e9d2511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2021/3/24/2684828531867648/2685007016345600/STEM/57f4a74e0ba34e6ab121eefc069d3acc.png?resizew=149)
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【推荐2】如图,在
中,对角线
相交于点
,且
过点
作
交
于点
连接
若
的周长为
.则
的周长为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c89a03f9227dc62c0563d16c86f7fb4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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【推荐1】如图,在
中,
,点D是
内部一点,
,点E是边
上一点,若
平分
,
,则
的度数为_______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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名校
【推荐2】如图,矩形ABCD中,O为AC中点,过点O的直线分别与AB、CD交于点E、F,连结BF交AC于点M,连结DE、BO.若∠COB=60°,FO=FC,则下列结论:①FB垂直平分OC;②△EOB≌△CMB;③DE=EF;④
.其中正确结论的个数是(填写序号)________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4424715955fe48181176de5764bd1525.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/16/44d6563d-bb70-4046-b0e8-897d4d701735.png?resizew=191)
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