如图,在
中,对角线
相交于点O,
,
,点E,F分别是
的中点,连接
,
,垂足为点M,
交
于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/6cdb83d7-7bae-45a4-a0b2-c00578d89682.png?resizew=198)
(1)求证:
;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54cfc1c15c0361cf5b81c03640faede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a962b779c6df3174f9d36532e47e31b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335805492d64d34226f0f231ba4426b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa9ef3ee8838c3e3f5ecdfd0c093418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/6cdb83d7-7bae-45a4-a0b2-c00578d89682.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a95e82e1ee64b4f3a1f3890ea6c600e6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
21-22八年级下·全国·课后作业 查看更多[4]
(已下线)【浙教版课时练习】八年级下册 4.5 三角形的中位线山东省烟台市海阳市2022-2023学年八年级上学期期末数学试题(已下线)专题 4.32 平行四边形(全章复习与巩固)(知识讲解)-2022-2023学年八年级数学下册基础知识专项讲练(浙教版)(已下线)2023年山东省济南市中考二模数学试题变式题16-20题
更新时间:2023-03-16 17:00:21
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解答题-作图题
|
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【推荐1】如图,四边形ABCD为平行四边形,请利用尺规作图法在BC边上求作一点M,连接AM,使得
.(不写作法,保留作图痕迹)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645dbcd52a11307612c083152724941c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/bd893425-78d1-4d76-9242-a6529d631a42.png?resizew=220)
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解答题-证明题
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【推荐2】如图,四边形ABCD是平行四边形,延长CB至点E,使得BE=BC,连结DE交AB于点F.
(1)求证:△ADF≌△BEF.
(2)连结DB,若AD=DB=5,CD=6,求DE的长.
(1)求证:△ADF≌△BEF.
(2)连结DB,若AD=DB=5,CD=6,求DE的长.
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510594929180672/2511167752978432/STEM/8970b5dc211c4353a195437375194366.png?resizew=139)
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解答题-证明题
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【推荐1】已知:在平行四边形ABCD中,分别延长BA,DC到点E,H,使得
,
.连接EH,分别交AD,BC于点F,G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/8f42670f-e6a7-466b-bb0b-7c9db101be97.png?resizew=146)
(1)求证:
;
(2)连接BD交EH于点O,若
,则当线段AB与线段AD满足什么数量关系时,四边形BEDH是正方形?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbbb0fef80bccfff7eebca6d2803b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afbbfc5c9de77af2d0be209d03c2944.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/8f42670f-e6a7-466b-bb0b-7c9db101be97.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d076a36cf89b80d4229e6f30601f93.png)
(2)连接BD交EH于点O,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f1054e3a5c0fc7dca3d285108112c5.png)
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解答题-证明题
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【推荐2】如图,已知:平行四边形
中,
的平分线交于点
,且点
刚好落在
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交于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
与
之间有什么数量关系?并证明你的猜想
与
之间有什么位置关系?并证明你的猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-问答题
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名校
【推荐1】如图,点
和动点
在直线
上,点
关于点
的对称点为
,以
为边作
,使
,
,作
的外接圆
,点
在点
右侧,
,过点
作直线
,过点
作
于点
,交
右侧的圆弧于点
,在射线
上取点
,使
,以
,
为邻边作矩形
,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/b95a3433-7b67-4780-9849-bebe4ed85e9e.png?resizew=313)
(1)用关于
的代数式表示
______,
_______;
(2)当点
在点
右侧时,若矩形
的面积等于90,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82901484b0b4b192cdd45a88c6163aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42daba3c904ff54da22e51f1812ac4b0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/b95a3433-7b67-4780-9849-bebe4ed85e9e.png?resizew=313)
(1)用关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf757b473eb160e42173982184ac5b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e80bb0f244f283cd4c3faf809ba488d.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82901484b0b4b192cdd45a88c6163aa3.png)
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解答题-问答题
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适中
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【推荐2】如图,在
中,
,D、E分别是
的中点,连接
.点P从点D出发,沿
方向匀速运动,速度为
;同时,点Q从点B出发,沿
方向匀速运动,速度为
,当点P停止运动时,点Q也停止运动.连接
,设运动时间为
.解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/5c0f9c62-7613-449c-990f-b5e4aefe120e.png?resizew=472)
(1)
___________
,
___________(用含有t的代数式表示)
(2)请求出t为何值时,以点E、P、Q为顶点的三角形与
相似?
(3)当t为何值时,
为等腰三角形?(直接写出答案即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef1c531c4763a47cf7981d87596266b0.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4bf2ed4e49655ce765ba6ffbb6c7d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ba95116dc790b935d65bf540799cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d0c15cbf82ddad59427d39dfa9d7d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/5c0f9c62-7613-449c-990f-b5e4aefe120e.png?resizew=472)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbbedd9ad877430c39ae6003d6ffb74.png)
(2)请求出t为何值时,以点E、P、Q为顶点的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(3)当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17277a306d4d0a0a0cf293f87802cf66.png)
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