如图,
,
,
和
相交于点O.
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc6cfc2eafb07d6f690da4d5ca5a754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/2aaab9fb-af9e-4a1d-8483-3eca138c21a5.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50834e39c4e028e0fc303b94d571923.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d757a0b14e704db5e788d065616430c8.png)
更新时间:2023-09-14 20:54:19
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【推荐1】如图所示,△ABC≌△AEC,B和E是对应顶点,∠B=30°,∠ACB=85°,求△AEC各内角的度数.
![](https://img.xkw.com/dksih/QBM/2013/1/5/1573582133469184/1573582146101248/STEM/c509e882-b952-4d8d-9617-2df77bc6c421.png)
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解答题-证明题
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【推荐2】如图,点
、
、
、
在同一直线上,
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![](https://img.xkw.com/dksih/QBM/2020/12/16/2620554343571456/2625353906692096/STEM/4e30e1f4-cce2-4344-a040-36525e2dea76.png?resizew=194)
(1)求证:
.
(2)若
与
相交于点
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83ba731cf0dd5160b982a1d9a046809.png)
![](https://img.xkw.com/dksih/QBM/2020/12/16/2620554343571456/2625353906692096/STEM/4e30e1f4-cce2-4344-a040-36525e2dea76.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680fb0a3f3cba59fc3092fb9b0a89008.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48813b8fc61cdb0c54fbc6a2e4bbd30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
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【推荐1】已知:如图,点A,D,C,B在同一条直线上,AD=BC,AE=BF,CE=DF,求证:
![](https://img.xkw.com/dksih/QBM/2022/1/10/2898567297990656/2961344711983104/STEM/cfcf949a-6102-459a-8060-78df990b3883.png?resizew=298)
(1)△AEC≌△BFD
(2)DE=CF
![](https://img.xkw.com/dksih/QBM/2022/1/10/2898567297990656/2961344711983104/STEM/cfcf949a-6102-459a-8060-78df990b3883.png?resizew=298)
(1)△AEC≌△BFD
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名校
【推荐2】已知AB=DE,BC=EF,D,C在AF上,且AD=CF,求证:△ABC≌△DEF.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/e13fea7d-26ae-45fa-9567-207d7e004197.png?resizew=131)
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