如图,等腰直角
中,
,
,
、
的平分线交于点
.
(1)求证:
;
(2)若
的外角平分线以及
的平分线交于点
,(1)结论是否成立?请在图中补全图形,写出结论,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2019/11/29/2344270368989184/2345138960596992/STEM/6d3ab60ff8b4450cacfa3d6cf2513b3e.png?resizew=295)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1b582113561094b66b1d82e02e2ea6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
更新时间:2019-11-30 17:40:20
|
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,四边形ABCD是平行四边形,AE过BC的中点O且交DC的延长线于点E连接AC,BE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/b514bd3a-5ebb-4dcb-bd0f-ad4ca5d01c7c.png?resizew=213)
(1)求证:△AOB≌△EOC;
(2)若
且
,判断四边形
是什么特殊四边形?请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/b514bd3a-5ebb-4dcb-bd0f-ad4ca5d01c7c.png?resizew=213)
(1)求证:△AOB≌△EOC;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4a288554fe25fe0a72530eb29756e1.png)
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,
为正方形
内一点,点
在
边上,
点
为
的中点,点
为
的中点,
与
的延长线交于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c49d0377bad658ea267aecf147f9e0e.png)
(2)线段
与
有无确定的数量关系,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e886720bb4055960dc88dc5edfe9352d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c49d0377bad658ea267aecf147f9e0e.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,已知
中,
,
,边
的垂直平分线,交
的延长线于点D,交边
于点E.
的长;
(2)求点C到直线
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6060d9a82ed5405a1ea8cd824448b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求点C到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】如图,在△ABC中,AB=AC,D为BC的中点,AE∥BC,DE∥AB.求证:四边形ADCE为矩形.
![](https://img.xkw.com/dksih/QBM/2017/12/3/1830627570925568/1831266136064000/STEM/9cc36fdb810d4bd4aa903e7b0bd7d5fc.png?resizew=131)
您最近一年使用:0次