如图所示,在平行四边形
中,延长
到点E,延长
到点F,使得
,连接
,分别交
,
于点M,N,连接
,
.
(1)求证:
;
(2)求证:
与
互相平分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05ff21cbb0faaabe1b9896daab3251e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/0116fb84-a95e-4d4e-8645-354b2e9aaceb.jpg?resizew=137)
17-18八年级下·全国·单元测试 查看更多[3]
更新时间:2018-02-18 09:23:05
|
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解答题-证明题
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适中
(0.65)
【推荐1】如图1,
,其中
,
.
(1)若两个三角形按图2方式放置,
、
交于点
,连接
、
,则
与
的数量关系为 ,
与
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(2)若两个三角形按图3方式放置,其中
、
(D)、
在一条直线上,连接
,
为
中点,连接
、
.探究线段
与
之间的关系,并证明;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58b99216b6f3125c6e741f5caa39671.png)
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(1)若两个三角形按图2方式放置,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)若两个三角形按图3方式放置,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,平行四边形ABCD中,BD⊥AD,∠A=45°,E、F 分别是AB、CD上的点,且BE=DF,连接EF交BD于O.
(1)求证:O是BD的中点;
(2)若EF⊥AB,延长EF交AD的延长线于G,当FG=2时,求AE的长.
(1)求证:O是BD的中点;
(2)若EF⊥AB,延长EF交AD的延长线于G,当FG=2时,求AE的长.
![](https://img.xkw.com/dksih/QBM/2021/5/28/2730895713853440/2737430949740544/STEM/d46f42a3190f495b8fb064c373ce94bf.png?resizew=193)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
内接于
,
的延长线交
于点
,交
于点
,过点
作
交
于点
,连接
,
.
(1)若
,求证:
;
(2)求证:点
到
的距离等于
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fda6d76fb350332472e76fefcca6a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/23/9d5d4a10-4abf-4b30-b828-3ef5290fb373.png?resizew=172)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac52d97c07b4c2d57f09edccdecce6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0105d0889f6fa9cb5430cf9e09337173.png)
(2)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378fb04b88d74f59fb04ed5a56de5eb7.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】在
中,
,
分别是
,
的中点,
于点
,
于点
,连接
,
.
(1)求证:四边形
是平行四边形.
(2)当
,
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cd81afc27aa4b51f3d41c953e22964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c7b6aef6388e2c3b1b3c826836abd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/2929363e-a23d-443d-b4ab-96b220fda862.png?resizew=148)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5406e7922357e0396a651e0cda56de93.png)
(2)当
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