四边形
是平行四边形,点
在
边上运动(点
不与点
,
重合)
![](https://img.xkw.com/dksih/QBM/2019/9/10/2287759370805248/2288243684073472/STEM/00e5fe0562e4476187e8496e15901abb.png?resizew=338)
(1)如图1,当点
运动到
边的中点时,连接
,若
平分
,证明:
;
(2)如图2,过点
作
且交
的延长线于点
,连接
.若
,
,
,在线段
上是否存在一点
,使得四边形
是菱形?若存在,请说明当发
,点
分别在线段
,
上什么位置时四边形
是菱形,并证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2019/9/10/2287759370805248/2288243684073472/STEM/00e5fe0562e4476187e8496e15901abb.png?resizew=338)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b929269c53a44907dba8ee298a0a522.png)
(2)如图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d4e574c9d139615d991a168cfbf63b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1b3daff578c575aa92e89573a8c757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1b3daff578c575aa92e89573a8c757.png)
更新时间:2019-09-11 08:26:36
|
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【推荐1】在菱形
中,
,
,
两点分别在
,
边上,
.连接
,取
的中点
,连接
,
.
(1)依题意补全图1,并写出
的度数;
(2)用等式表示线段
与
的数量关系,并证明;
(3)若
,
,
的交点为
,连接
,
,四边形
能否成为平行四边形?若能,求出此时
的长;若不能,请说明理由.
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(1)依题意补全图1,并写出
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(2)用等式表示线段
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(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
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解答题-问答题
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较难
(0.4)
【推荐2】已知,直线y=kx﹣1与抛物线y=
交于A,B两点(点A在点B的左侧).
(1)当k=
时,求A,B两点的坐标;
(2)点P是直线AB下方的抛物线上一点,点Q在y轴上,且四边形APBQ是平行四边形.
①如图1,在(1)的条件下,求▱APBQ的面积;
②当k变化时,Q点是否是y轴上的一个定点?若是,请求出点Q的坐标,若不是,请说明理由.
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您最近一年使用:0次
解答题-证明题
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较难
(0.4)
真题
名校
【推荐1】
和
均为等边三角形,点E、D分别从点A,B同时出发,以相同的速度沿
运动,运动到点B、C停止.
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(2)如图2,当点E、D不与点A,B重合时,(1)中的结论是否依然成立?若成立,请给予证明;若不成立,请说明理由;
(3)当点D运动到什么位置时,四边形
的面积是
面积的一半,请直接写出答案;此时,四边形
是哪种特殊四边形?请在备用图中画出图形并给予证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-作图题
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【推荐2】在如图中,A、B两点在反比例函数y=
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(1)在图1中,在x轴上画出点F,使四边形ADBF为矩形;
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(1)在图1中,在x轴上画出点F,使四边形ADBF为矩形;
(2)在图2中,画出菱形ACBF.
您最近一年使用:0次