如图,
中,
垂直平分
垂直平分
,垂足分别为E、G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/2b4ea20c-2c53-49d8-900c-595b4aea5ed6.png?resizew=204)
(1)若
的周长为16,求
的长;
(2)若
,则
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cf5334c78c8188c558aaa20b071893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/2b4ea20c-2c53-49d8-900c-595b4aea5ed6.png?resizew=204)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/592849d99e570c23906687097b1072ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe96359b3d85c42aa931a199e0c2cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad75bdd17013af544fc97ab1dcecb873.png)
更新时间:2023-12-15 09:04:19
|
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解答题-计算题
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【推荐1】如图,在
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解答题-证明题
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【推荐2】如图,
,
,
,点
在边
上,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/4784dbc6-f814-4f99-8cbb-a9539f0ec9fc.png?resizew=151)
(1)求证:
;
(2)若
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的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21d89e915c8b857db0e699361c59e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34d002bb75c959626c337c74ba92715.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/4784dbc6-f814-4f99-8cbb-a9539f0ec9fc.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401ae437d4a0e6c55e2ec357f0d7eb29.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af2d017b17355dad1e9331c47d9786e.png)
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解答题-问答题
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【推荐1】如图,
是
中
边的垂直平分线,分别交
,
于点
,
,
平分
,若
.求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-作图题
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【推荐2】如图,已知△ABC.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958714100359168/2962277819891712/STEM/df0d1417-538f-403b-b3f0-0152632df31c.png?resizew=136)
(1)用直尺和圆规按下列要求作图:
①作内角∠BAC的角平分线,交BC于点D;
②作线段AD的垂直平分线,且中点为O,分别交AB、AC于点E、F;(不写作法,并把作图痕迹用黑色签字笔加黑)
(2)连接DE、DF,判定四边形AFDE的形状并证明.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958714100359168/2962277819891712/STEM/df0d1417-538f-403b-b3f0-0152632df31c.png?resizew=136)
(1)用直尺和圆规按下列要求作图:
①作内角∠BAC的角平分线,交BC于点D;
②作线段AD的垂直平分线,且中点为O,分别交AB、AC于点E、F;(不写作法,并把作图痕迹用黑色签字笔加黑)
(2)连接DE、DF,判定四边形AFDE的形状并证明.
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解答题-问答题
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【推荐1】如图,在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-作图题
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【推荐2】如图,△ABC中,AB=AC,∠A=40°
(1)作边AB的垂直平分线MN(保留作图痕迹,不写作法)
(2)在已知的图中,若MN交AC于点D,连结BD,求∠DBC的度数.
(1)作边AB的垂直平分线MN(保留作图痕迹,不写作法)
(2)在已知的图中,若MN交AC于点D,连结BD,求∠DBC的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/558257e8-7eb1-40ca-aa70-a9f227e7182d.jpg?resizew=105)
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