名校
1 . 如图,在同一平面内,小颖同学用一个含有
的直角三角板靠紧墙角两边滑动,经过她的研究发现:①点C到墙壁、地面的距离总能保持相等;②斜边
的中点O到两直角顶点的距离也能保持相等.(其中
、
、
)作
于E,
于F,请根据下面问题给出你的解答:
(1)求证:
.
(2)求证:四边形
是正方形.
(3)连接
,求证:
.
(4)当
、
时,求三角板的直角边
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cfd06965af6014208127f2880b476b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac18b0388014ae20b2add2975ef56aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/83adb4c4-2e42-4eb6-8705-b0138aad8fca.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac679f877d3e3b3acef1f1f8e3654b4b.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af045d2542c40f955a9de356b9b088c4.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02820d6c8dfc295d60dcfcd95b30a3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50f357512a4b05fd9e79a315041d22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
2 . 填空:把下面的推理过程补充完整,并在括号内注明理由.
已知:如图,
中,D、E分别为
、
的中点,求证:
.
证明:∵
( ),
∴
( ),
∵E为
的中点(已知),
∴
( ),
在
与
中,
, = ,
,
∴
( ),
∴
( ),
∵D为
的中点,
∴
(中点的定义),
∴
( ).
已知:如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/4d59461614e585c966d847c512e5b92d.png)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9f641563e8533a5bb39188aa7cc182.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/badde435cf8beb6b0144e87f4daa33d2.png)
∵E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553a93e0b6156befa00b50bdfaef95d9.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c333f2e1769473c6ada9790f841572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/badde435cf8beb6b0144e87f4daa33d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3971a9519246550390de4bd599617d.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967578d2c4086aef3fda57ed4cdae5c0.png)
∵D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d59461614e585c966d847c512e5b92d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/063fa892-3a78-48b2-9f03-027eba4cf4b2.png?resizew=125)
您最近一年使用:0次
3 . 如图,在
中,
平分
,
,
,则
与
之间的大小关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66c7a677b9230fe19d301828469ef1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c2720ae026b9370b45917e88edec08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/7/a25a880f-6d3d-4d2d-a802-6665797aa7f4.png?resizew=152)
A.![]() | B.![]() | C.![]() | D.无法确定 |
您最近一年使用:0次
2023-07-21更新
|
83次组卷
|
2卷引用:广东省惠州市惠城区惠港中学2021-2022学年八年级下学期开学考试数学试题
4 . (1)【问题原型】如图①,在正方形
中,点
分别在边
,
上,且
,点
为
,
的交点,求证:
.
(2)【探究发现】某数学兴趣小组,在尝试对上述问题进行变式,转换了问题的背景图形:如图②,在等边
中,点
,
分别在边
,
上(不与三角形顶点重合),且
,点
为
,
的交点,请画出图形并求
的度数.
(3)【拓展提升】利用【探究发现】的思路及结论,继续探究,尝试解决如下问题:
如图③,在菱形
中,
,点
分别在边
,
上,且
,
,点
为
,
的交点,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff63fd16efe9dac36da5eaa3fc0203e1.png)
(2)【探究发现】某数学兴趣小组,在尝试对上述问题进行变式,转换了问题的背景图形:如图②,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffab06abe01c9b48aa4692c73d8b7c6.png)
(3)【拓展提升】利用【探究发现】的思路及结论,继续探究,尝试解决如下问题:
如图③,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b17ebc8fad227cc3bb7d0353969b1de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9b11f2ea112fff1885811bd5bc73cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffab06abe01c9b48aa4692c73d8b7c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/19/356c28a3-9b20-4a4c-865c-ce1fd5da6596.png?resizew=556)
您最近一年使用:0次
5 . 如图,在扇形
中,
的长为
,
,点
为
的中点,点
,
分别在半径
,
上,点
,
在
上,四边形
为矩形,连接
,
.
![](https://img.xkw.com/dksih/QBM/2023/7/14/3280616812732416/3280666494861312/STEM/7eb72f2e28104b0f9a8ca56966c08c7a.png?resizew=189)
(1)求证:
;
(2)设
,矩形
的面积为
,求
关于
的函数解析式及其定义域;
(3)连接
,当
的正切值为
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e21aa38de80da8ccaa7ce51595e7bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.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/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://img.xkw.com/dksih/QBM/2023/7/14/3280616812732416/3280666494861312/STEM/7eb72f2e28104b0f9a8ca56966c08c7a.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0da1cf1a0a2ee4e9de2326d245946e2.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745e1f5c1a3100edbe52cc81312b6a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff4ffd44fedc9bd6c8b4d59f933301f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
您最近一年使用:0次
2023-07-14更新
|
38次组卷
|
2卷引用:广东省惠州市惠阳区秋长镇黄埔学校2022-2023学年九年级上学期12月月考数学试题
6 . 如图
,
、
、
三点在一直线上,分别以
、
为边在
同侧作等边
和等边
,
交
于点
,
交
于点
.
(1)
吗?
吗?请说明理由.
(2)如图2,若
、
、
不在同一直线上,那么这时上述结论成立吗?若成立请证明.
(3)在图1中,若连接
、
,你还能得到什么结论?(写出结论,不需证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb961bd7db3adb76af2d4cedb611bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc12fd638cffc9d0f1daf001b405eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/89b4c81b-0bf8-413f-9a75-e34d6046414c.png?resizew=450)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bec9f2dc99d0188f362f11c0c23739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d550a92fd2af6f57cc7407cc326b1ea7.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)在图1中,若连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
您最近一年使用:0次
7 . 如图:在平面直角坐标系中,直线
与坐标轴交与
,
两点,直线
与直线
交于点
.
(1)求
点坐标;
(2)在
轴上有一点
,
在
的右侧,若
;求
点坐标;
(3)在第(2)小题的条件下,点
为
轴正半轴上一点,且
,若在
轴上存在一个点
,使得
是等腰三角形,直接写出
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6260eab23074ea6f1360dafd6656181f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be9c280847d414dd73263a01fb9dc46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/30/68dc3c3a-5852-40fa-89a6-a9569bcee00b.png?resizew=273)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeaec0fbb527f4215500acdb8084f852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)在第(2)小题的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76805974fefbe166b90d260e822ab5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
8 .
证明体验![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
(1)如图1,在
中,点
在边
上,点
在边
上,
,
,
与
相交于点
.求证:
.
思考探究![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
(2)如图2,在(1)的条件下,过点
作
的平行线交
于点
,若
,
,求
的长.
拓展延伸![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
(3)如图3,在四边形
中,对角线
与
相交于点
,
,
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934abdab2cb16e0adea3442c65587bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07b92b8282c7fd1158b3b5098e38c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37773e6825893988fda814b915047111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934abdab2cb16e0adea3442c65587bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
(2)如图2,在(1)的条件下,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe308dcc38f31d52a77ee65bb00dd88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934abdab2cb16e0adea3442c65587bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c828839ec7daffe75d61c24298afe7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8164064c1e4fd6ff5c0b43edbdcd50f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e03d183974c765e4cf331eb864f421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91934cac6477909cf68ec266f562a397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/5c0f2af4-e3d9-4a9f-89a5-01c438629b34.png?resizew=457)
您最近一年使用:0次
2023-03-23更新
|
269次组卷
|
2卷引用:2022年广东省广州市番禺区九年级数学二模试卷
9 . 如图,
是正方形,
是
的直径,点E是
上的一动点(点E不与点B,C重合),连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/a54d5ce1-2050-4fea-8321-a1b6e2ac45e7.png?resizew=184)
(1)若
,求
的度数;
(2)若
为
的切线,连接
交
于点F,求证:
;
(3)若
,过点A作
的垂线交射线
于点M,求
的最小值.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74da39e2208b1808105dfad437a9e6c0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/a54d5ce1-2050-4fea-8321-a1b6e2ac45e7.png?resizew=184)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26139800907c11163d97aa91ce872d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b55b502f406c3525ce81b60bdfdc11e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37bc9dbc6395297f3677e69c891ad87a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9b11f2ea112fff1885811bd5bc73cc.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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10 . 如图,
的半径为2,将
的直径
绕点B顺时针旋转
得到线段
,
与
交于点F,过点C作
于点D,连接
.
当
时,
的长度为________ ;
当
时,
的长度为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603d15d9432b7722877119ef499f3a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047367808256e193a9e04e66d230c62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1625e1079d53147151aa54c5c51a1ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/536350e2-b1cf-4de6-9de7-13d758c22be8.png?resizew=144)
您最近一年使用:0次