如图,在
中,
,
,
,
,
是
的平分线,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/04aa0c7f-f359-4343-b20f-34bd7948bbdc.png?resizew=196)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/04aa0c7f-f359-4343-b20f-34bd7948bbdc.png?resizew=196)
A.5 | B.6 | C.7 | D.8 |
更新时间:2024-03-08 10:59:19
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【推荐1】如图,ABC中,ABAC,点D是BC边的中点,若DEAB ,DFAC,垂足分别是E、F,则下列结论不一定正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/e41c87bc-e89b-4726-97b3-f2adfc9dafb6.png?resizew=171)
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【推荐2】如图,点E是∠AOB的平分线上一点,EC⊥OA,ED⊥OB,垂足分别是C,D.下列结论中正确的有( )
(1)ED=EC;(2)OD=OC;(3)∠ECD=∠EDC;(4)EO平分∠DEC;(5)OE⊥CD;(6)直线OE是线段CD的垂直平分线.
![](https://img.xkw.com/dksih/QBM/2019/9/24/2297712391004160/2302478301904896/STEM/71cdccf5e4fb4e39938c9fe2adee2e17.png?resizew=149)
(1)ED=EC;(2)OD=OC;(3)∠ECD=∠EDC;(4)EO平分∠DEC;(5)OE⊥CD;(6)直线OE是线段CD的垂直平分线.
![](https://img.xkw.com/dksih/QBM/2019/9/24/2297712391004160/2302478301904896/STEM/71cdccf5e4fb4e39938c9fe2adee2e17.png?resizew=149)
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【推荐1】如图,在△ABC中,∠C=90°,AC=BC,BD是∠ABC的平分线,DE⊥AB于点E,若△ADE的周长等于10,则AB的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/aee7329c-4448-45ce-87ea-da517c301ed6.png?resizew=99)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/aee7329c-4448-45ce-87ea-da517c301ed6.png?resizew=99)
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【推荐2】如图,在
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平分
交
于点
,则点
到
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】对于边长为
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【推荐2】如图,在矩形
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