如图,已知在
中,线段
分别交
、
、
于点
、
、
,且
,连接
、
.
![](https://img.xkw.com/dksih/QBM/2021/8/3/2778080020013056/2779650978971648/STEM/171d7c0e-49f5-4e53-aa0a-e7d6973a4d3e.png?resizew=251)
(1)求证:四边形
为平行四边形;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0944865f14b13a772526c4cae4f29c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2021/8/3/2778080020013056/2779650978971648/STEM/171d7c0e-49f5-4e53-aa0a-e7d6973a4d3e.png?resizew=251)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9766e5eb6796dafc5ffe212afdfc43c0.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb8f7ac061eb44abd9edc4346c07745.png)
更新时间:2021-08-05 15:17:18
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/660c7d5f-2764-4201-a815-8dd8c3a7882f.png?resizew=138)
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