题型:解答题-证明题
难度:0.65
引用次数:86
题号:22341396
问题情境:在
中,
是边
上的高,点E为
上一点,连接
,过点D作
交
于点F.
猜想与证明:
的中点时,试判断点F是否为边
的中点,并说明理由;
(2)如图2,连接
,试判断
与
是否相似,并说明理由;
问题解决:
(3)如图3,当
时,试求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4288502c3b0d02052cb038c88dd35c5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c175c239742c7ba8fd67a6d5f99cb1b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
猜想与证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
问题解决:
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac679f877d3e3b3acef1f1f8e3654b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
更新时间:2024-04-22 21:04:15
|
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适中
(0.65)
【推荐1】如图,
是
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成
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的延长线于点B.且
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(1)求证:
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.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1,直线AB:y=
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(1)求A、B两点的坐标;
(2)求线段BC的长;
(3)点P为x轴上的动点,当∠PBA=45°时,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
(1)求A、B两点的坐标;
(2)求线段BC的长;
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/f0a5f34c-b027-4407-bb96-ac92bd6ce762.png?resizew=345)
您最近一年使用:0次
解答题-问答题
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适中
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名校
【推荐1】已知:如图,在平行四边形
中,点E是边
上的一点,
,联结
与对角线
相交于点F,
,
(1)求
的长;
(2)设
,
,用
,
的线性组合表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/26/e44405e9-d17d-4e0e-a18f-38073154dbef.png?resizew=186)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54468af5365f7746cbc36a8473a280c5.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图 1,在矩形
中,
,
是边
的中点,
(与点
不重合)是边
上一动点,连接
,延长
交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/0cc3459d-5744-421b-b3ad-92c5a8cf9256.png?resizew=433)
(1)若
,求证:
①
;
②求
的长.
(2)如图 2,分别取
的中点
,连接
,当
时, 求
的长和
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1e11050f9706a5d2730eff38b0971c.png)
①
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②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
(2)如图 2,分别取
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