如图,已知AB=AC,AD⊥BC,AB+BD=DE,求证:点C在AE的垂直平分线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/227ee820-df01-46c1-93a6-d5a81717bbe5.png?resizew=243)
更新时间:2021-12-06 16:16:00
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解答题-证明题
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【推荐1】如图,
为等腰三角形,
,
和
分别为等边三角形,
与
相交于点F,连接
并延长,交
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/6501972a-acae-4fa3-b60f-47618e33a3eb.png?resizew=197)
求证:
(1)
;
(2)点G为AB的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a9ec45721f7b4d1c99917ac0d970f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/6501972a-acae-4fa3-b60f-47618e33a3eb.png?resizew=197)
求证:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061b0a17b2590efbeb08c9778a5e1fa4.png)
(2)点G为AB的中点.
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【推荐2】学习了线段中垂线后,爱动脑筋的小明制作了一个画线段垂直平分线段的仪器,图纸如图所示,AB=AC,BD=CD.在使用的过程中,将点B与线段的一个端点重合,改变ABDC的形状,使C点与线段的另一个端点重合,则过A、D画直线,直线AD即为线段的垂直平分线.请用学过的知识说明理由.
![](https://img.xkw.com/dksih/QBM/2022/1/6/2894334328619008/2959213034094592/STEM/c288f025-7788-4c38-88f9-ee2dc00abc90.png?resizew=129)
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【推荐1】已知,在
中,
,E是
上一点
,
垂足为D,交
于点F.若
,试判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d1f310224b344d66d943183e675cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da31eca4e0ae863f70cb6d16a9381c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/489cf1e6aed3cf23479a57e1e597252e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8626be63a95a3c43f05406dd7b76b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/ba185c07-3728-4533-87fa-3454dab248bf.png?resizew=143)
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解答题-作图题
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【推荐2】如图,已知∠AOB,OA=OB,点E在OB边上,四边形AEBF是矩形.请你只用无刻度 的直尺在图中画出∠AOB的平分线(请保留画图痕迹),并写出证明过程.
![](https://img.xkw.com/dksih/QBM/2022/6/6/2995503591022592/3072658652422144/STEM/bac44c88016f4d3685a4bd5fb3ca646a.png?resizew=115)
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