1 . 如图,在
中,过点
作
于点
,连结
为线段
上一点,且
.
(1)求证:
;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a2a6e60b59a7238803753633407701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a27a3aa74857aad19b7faf87d49e33.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/10bfde4c-df35-4a73-a4ca-796a62f2e02c.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8dcf1f301e1459d8065ef356ea83b2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4187a861d1c558ee70701fc501f58842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72bdba4d53bc0f335d53a30fd354c75b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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名校
2 . 在矩形
中,
,
,
,连结
,点F是
边上一动点,连结
,交
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/fbaae2ed-4a19-4ce1-809a-9368cff17b66.png?resizew=307)
(1)如图1,当
时,求证:
;
(2)如图2,当点F与点C重合时,求
的长;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8408cdf53667cef5c76fb3a2cec99e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/fbaae2ed-4a19-4ce1-809a-9368cff17b66.png?resizew=307)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0784452bb30dcf4b8d88f0ae72d82a6e.png)
(2)如图2,当点F与点C重合时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
您最近一年使用:0次
2023-12-10更新
|
87次组卷
|
2卷引用:海南省儋州市联考2023-2024学年九年级上学期期中数学试题
名校
3 . 如图1,在正方形
中,点E是边
上一点(点E不与点B、C重合),
交
延长线于点F.
(1)求证:
;
(2)如图2,连接
,交
于点K,过点D作
交
于点G,垂足为点H,连接
、
.
①求证:
;
②若
,设
,当
是等边三角形时,求x的值;
③当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c175c239742c7ba8fd67a6d5f99cb1b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/7/c074ea9f-974e-431a-96a5-b7099510c22c.png?resizew=376)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0757d8c6392f6df6fdddf556ccd6ba71.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce50eeb654ef50f36a582c785f273ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca14f6100d829f197a5dac5197bbe0b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128d03f69ded2b2952693ebf5379f2e6.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a372a3f4a7e8599b03f33fcbebc249b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966aebc4d574ee3514a7ec49800d1270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1426d11f66569af1b70ed7913b0c27.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9062949d35bd231c39da5d05b28ffdce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ad48b97a94a46880ececc33aab7f2e.png)
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4 . 如图,在
中,点
、
分别在边
、
上,
与
相交于点
,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/7c9e79ea-f1b3-4447-9d76-62c7b8924b66.png?resizew=141)
(1)求证:
;
(2)已知
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20dfb9761ea31e696c07eb77365de08a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d414b30160c327f673023e25e7ad38f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3bc4de1b5cd2a569b139d6a7a4c214.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/7c9e79ea-f1b3-4447-9d76-62c7b8924b66.png?resizew=141)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cdcf76f974689a0c3a621c4c119769.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2ab8b9338fbcdf04d0e703337ea34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
您最近一年使用:0次
2023-02-21更新
|
98次组卷
|
7卷引用:海南省海南中学2019-2020学年九年级上学期期末数学试题
名校
5 . 如图1,在正方形
中,点
为边
上的点,
,连结
、
,过点
作
,垂足为点
,与
、
分别交于点
、
,连结
.
(1)①求证:
≌
;
②求证:
;
(2)如图2,当
时,求
的值.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97d3109546fd3a6006bcfd55e32f037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16cc20b0d24b7a2f4dcc3d337a76b661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
(1)①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73ba8e6b68518ab39925ffbe8e17f74.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b74125e6da1257a2d306a10318eea7.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9aba04ce11ab6472f652efd9cf0c9de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/84dc4910-ab2f-44ee-b60b-0269847b0301.png?resizew=339)
您最近一年使用:0次
名校
6 . 在矩形ABCD中,点P在AD上,AB=2,AP=1.直角尺的直角顶点放在点P处,直角尺的两边分别交AB、BC于点E、F,连接EF(如图1).
![](https://img.xkw.com/dksih/QBM/2019/12/5/2348629477040128/2349359434342400/STEM/dead775ad5c94c2da5361bf083f02886.png?resizew=481)
(1)当点E与点B重合时,点F恰好与点C重合(如图2).
①求证:△APB∽△DCP;
②求PC、BC的长.
(2)探究:将直角尺从图2中的位置开始,绕点P顺时针旋转,当点E和点A重合时停止.在这个过程中(图1是该过程的某个时刻),观察、猜想并解答:
① tan∠PEF的值是否发生变化?请说明理由.
② 设AE=x,当△PBF是等腰三角形时,请直接写出x的值.
![](https://img.xkw.com/dksih/QBM/2019/12/5/2348629477040128/2349359434342400/STEM/dead775ad5c94c2da5361bf083f02886.png?resizew=481)
(1)当点E与点B重合时,点F恰好与点C重合(如图2).
①求证:△APB∽△DCP;
②求PC、BC的长.
(2)探究:将直角尺从图2中的位置开始,绕点P顺时针旋转,当点E和点A重合时停止.在这个过程中(图1是该过程的某个时刻),观察、猜想并解答:
① tan∠PEF的值是否发生变化?请说明理由.
② 设AE=x,当△PBF是等腰三角形时,请直接写出x的值.
您最近一年使用:0次
2019-12-06更新
|
775次组卷
|
7卷引用:海南省海口市2019-2020学年九年级上学期期末数学试题
海南省海口市2019-2020学年九年级上学期期末数学试题海南省海口市2018-2019学年九年级上学期期末数学试题2020年上海市中考数学模拟试题(已下线)专题5.1 图形的平移、对称与旋转-备战2021年中考数学精选考点专项突破题集(上海专用)(已下线)热点05 图形的平移、翻折与旋转-2021年《三步冲刺中考·数学》(上海专用)之第2步大题夺高分(已下线)专题16 图形的运动及应用(考点专练)-备战2021年中考数学考点微专题(上海专用)河北省廊坊市第四中学2022-2023学年九年级下学期月考数学试题
名校
7 . 如图,正方形 ABCD 的边长为 8,E 是 BC 边的中点,点 P 在射线 AD 上, 过 P 作 PF⊥AE 于 F.
![](https://img.xkw.com/dksih/QBM/2019/8/2/2260243479732224/2286127925379072/STEM/55fc7bd487a1437abc124de9f72dc789.png?resizew=124)
(1)请判断△PFA 与△ABE 是否相似,并说明理由;
(2)当点 P 在射线 AD 上运动时,设 PA=x,是否存在实数 x,使以 P,F,E 为顶 点的三角形也与△ABE 相似?若存在,请求出 x 的值;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2019/8/2/2260243479732224/2286127925379072/STEM/55fc7bd487a1437abc124de9f72dc789.png?resizew=124)
(1)请判断△PFA 与△ABE 是否相似,并说明理由;
(2)当点 P 在射线 AD 上运动时,设 PA=x,是否存在实数 x,使以 P,F,E 为顶 点的三角形也与△ABE 相似?若存在,请求出 x 的值;若不存在,说明理由.
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2019-09-08更新
|
1408次组卷
|
9卷引用:【校级联考】海南省定安县2019届九年级上学期期末考试数学试题
8 . 如图,在正方形ABCD中,E是对角线BD上任意一点(BE>DE),CE的延长线交AD于点F,连接AE.
(1)求证:△ABE∽△FDE;
(2)当BE=3DE时,求tan∠1的值.
(1)求证:△ABE∽△FDE;
(2)当BE=3DE时,求tan∠1的值.
![](https://img.xkw.com/dksih/QBM/2018/1/4/1853102834434048/1855425519992832/STEM/ee9d7db2-df2e-4dd5-a962-1ac8d42fea61.png?resizew=126)
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2018-01-07更新
|
236次组卷
|
3卷引用:2017年海南省文昌市罗峰中学中考数学模拟试卷
9 . 如图9.1,在△ABC中,∠BAC=90°,点D为AB边上的一点,过点D作DE⊥BC于E,连接CD,过点A作AF∥DE交CD于点F,交BC于点G,连接EF.
(1)求证:△BED∽△BAC;
(2)写出所有与△BED相似的三角形(△BAC除外);
(3)如图9.2,若四边形ADEF是菱形,连接对角线AE与DF相交于点O.
①求证:OA2=OC·OF;
②当AE=12,CF=5时,求OF的长,并直接写出△BED与△BAC的相似比的值.
![](https://img.xkw.com/dksih/QBM/2017/9/7/1769084367642624/1769346057576448/STEM/4876ae1f7a204b358ad87f6118220fcb.png?resizew=493)
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10 . 如图,四边形ABEG、GEFH、HFCD都是边长为1的正方形.
(1)求证:△AEF∽△CEA;
(2)求证:∠AFB+∠ACB=45°.
(1)求证:△AEF∽△CEA;
(2)求证:∠AFB+∠ACB=45°.
![](https://img.xkw.com/dksih/QBM/2018/12/21/2101582302625792/2104380488851456/STEM/252d1e7317da46fdb070a233b697f5e9.png?resizew=198)
您最近一年使用:0次
2017-09-08更新
|
573次组卷
|
2卷引用:海南省海口市龙华区第六学区2017届九年级上学期期中检测数学试题