在
中,
,
.
(1)求证:
平分
;
(2)当
时,若
,
,求
和
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ec7b39ec6b2bbfc75a2138f601f6d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54118d72fe21da443757dafab5cdf3ef.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c83513f6ffe5615f64dd11be333ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
2018·河南信阳·一模 查看更多[4]
【全国百强校】河南省信阳高级中学2018届高三高考模拟二数学(理)试题四川省泸州市泸县第四中学2019-2020学年高一下学期期中考试数学试题陕西省西安市铁一中学2023-2024学年高三上学期9月月考理科数学试题(已下线)陕西省西安市铁一中学2023-2024学年高三上学期第一次月考理科数学试题
更新时间:2018-08-27 15:09:43
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适中
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名校
解题方法
【推荐1】已知
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(1)求
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(2)若
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【推荐2】在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1028358d40b270333478799d274271cd.png)
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注:如果选择多个条件分别解答,按第一个解答计分.
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解答题-问答题
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适中
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解题方法
【推荐1】已知平面四边形
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适中
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适中
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适中
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解答题-问答题
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适中
(0.65)
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