矩形
中,
,
.点
在边
、
上运动,连接
,将射线
绕点
逆时针旋转
,交直线CD于点
.
恰好与点
重合时,则
__________度;
(2)过点
作
于点
,连接
.
①如图2,当F落在线段
上时.求
的度数;
如图3,当
落在线段
的延长线上且
时,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a77f80a4c67da383d9ccd0d17bc8ee1.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336ef1ac24b20d9a4601d72928f58d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
①如图2,当F落在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28471c8fc90f635312ba55d3b3462624.png)
如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2609d0e7fe9a4f1e460d3276c23f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff4a9da6e1d8b023a77ef618a050a56.png)
2024·山东济南·二模 查看更多[2]
更新时间:2024-05-23 00:09:33
|
相似题推荐
解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐1】如图1,点C是线段
上一点,将
绕点C顺时针旋转90°得到
,将
绕点C旋转,使点B的对应点D落在
上,连
,
,并延长
交
于点F.
![](https://img.xkw.com/dksih/QBM/2020/10/26/2579589810569216/2585176162713600/STEM/ce1fe6a9-2112-4f01-80a6-0244081841a7.png)
(1)求证:
;
(2)连接
,猜想
,
,
存在的等量关系,并证明你猜想的结论.
(3)如图2,延长
到
,使
,将线段
沿直线
上下平移,平移后的线段记为
,若
,当
的值最小时,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2020/10/26/2579589810569216/2585176162713600/STEM/ce1fe6a9-2112-4f01-80a6-0244081841a7.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187ed13a7bd532bd39af5e5ad7493a2c.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9f22d1b8bdb527cdbba4c92d88920d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3cfaa86f87c412509830529c9a7a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2573d44bd027ab2e2fc2472c7852af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4d09e679fab03d8f53428a6be0da50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3110acf9d4c344892277875aba6a5d.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】如图(1),矩形
中,
,
,
经过点
且与
相切于点
,且点
,
,
共线,
与
,
边分别交于点
,点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/b3499197-45fd-4840-8886-9dc3d8a68dc2.png?resizew=348)
(1)
________
(用
,
表示).
(2)当点
平分
时,
,
边上是否存在点M,N,使得四边形
为平行四边形?若存在,请求出
,
的长;若不存在,请说明理由.
(3)如图(2),连接
,
交于点
,
与
交于点
,与
交于点
,求证:无论
,
为何值,
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df81cda12d7601d58b1d9c7c180c4d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/b3499197-45fd-4840-8886-9dc3d8a68dc2.png?resizew=348)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5f441402ee632377b6bedeb060f3d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb11da548560cae44e16c7e48174367f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
(3)如图(2),连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67716ac738ee2911a69bf4063110a5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cef92584cc9b68a15bdd26dff87402f.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
解题方法
【推荐3】问题发现:
(1)如图①,点A和点B均在⊙O上,且∠AOB=90°,点P和点Q均在射线AM上,若∠APB=45°,则点P与⊙O的位置关系是 ;若∠AQB<45°,则点Q与⊙O的位置关系是 .
问题解决:
如图②、图③所示,四边形ABCD中,AB⊥BC,AD⊥DC,∠DAB=135°,且AB=1,AD=2
,点P是BC边上任意一点.
(2)当∠APD=45°时,求BP的长度.
(3)是否存在点P,使得∠APD最大?若存在,请说明理由,并求出BP的长度;若不存在,也请说明理由.
(1)如图①,点A和点B均在⊙O上,且∠AOB=90°,点P和点Q均在射线AM上,若∠APB=45°,则点P与⊙O的位置关系是 ;若∠AQB<45°,则点Q与⊙O的位置关系是 .
问题解决:
如图②、图③所示,四边形ABCD中,AB⊥BC,AD⊥DC,∠DAB=135°,且AB=1,AD=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(2)当∠APD=45°时,求BP的长度.
(3)是否存在点P,使得∠APD最大?若存在,请说明理由,并求出BP的长度;若不存在,也请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/6671b07d-7ca6-42e9-b3f7-73821e2c6bf9.png?resizew=399)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐1】已知在
中,
,
,等腰三角形
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c09286e296ab706cb0135386562c2a.png)
(1)如图1,若
平分
,
平分
,求
的大小.
(2)如图2,若
,将
绕点O顺时针旋转
度得到
,
平分
,
平分
,当
且
时,用等式表示
和
的数量关系,并说明理由.
(3)若
,将
绕点O以
每秒的速度顺时针旋转,同时
以
每秒的速度逆时针旋转,当它旋转
后,两个三角形同时停止运动,在旋转过程中,
的角平分线
所在直线与△AOB的某条边所在直线垂直时,请直接写出旋转时间
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037ded7b2c5361b4aae67dd0a81da29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b030708f7e622f3f992649b21eec6b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c09286e296ab706cb0135386562c2a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/254ff7d8-4c99-4dd8-bac3-c9f14ce1f96a.png?resizew=462)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f54a188b5df502fd2a2185c3c534101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262ce01d5c912ebcc0622f47b4bd674a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b38d4adda7d8d17c365a54ba05cb98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b89ddabd85e5fd413fee5e85567907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b706512812023dfa0433807cd824049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70922f32720f25a3decbf00a9bc014e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2f7bab4ed36ec5d04db3aeed2796f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/725f52aba05bee150b8e8c5f806dac97.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f54a188b5df502fd2a2185c3c534101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654c79a470d5af5e0a34fd9233da5118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741a44528782580d24249e8075b8cd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐2】在
中,
,P为直线
上一动点, 连接
, 取
的中点
,将线段
绕点 C顺时针旋转到
,旋转角为α,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/b40a4a0f-0ca9-49da-a5f3-efc90984598d.png?resizew=381)
(1)当点P在
延长线上,且
时,解决以下问题.
①如图1,
与
相交于H, 若
,
,连接
,求
的长;
②如图2,当N落在
上时,取
的中点E, 连接
.点D为
上一点, 满足
, 求证:
.
(2)如图3,已知
,
,
. 连接
、
, 当
取得最小值时,直接写出四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/b40a4a0f-0ca9-49da-a5f3-efc90984598d.png?resizew=381)
(1)当点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9e8058ecfba287885cb97e65e3f577.png)
①如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc977ada53b23c9ac90033fc87f273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e443c88e7f2128069787c2285ef9c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97541433d53de25284bb68399ac1d105.png)
②如图2,当N落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/847279272c47f17aac7d5a8d896cebaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c672f6dbbe383f376483840b452c248e.png)
(2)如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03f73bec20b60bc7608972607f5a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d63279a231f5e49d46d289a675dc5d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b58405bdc96fc2046bed838ccdb5a6.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐1】如图,已知CE是
的直径,点B在
上由点E顺时针向点C运动(点B在直径CE上方且不与点E、C两点重合),弦BD交CE于点F,且
,过点B作弦CD的平行线与CE的延长线交于点A.
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931168582852608/2931229048283136/STEM/c0f76a61bd1345beac28fba7fae41c65.png?resizew=273)
(1)求证:BA为
的切线;
(2)当点B运动到使得
时,求
的大小;
(3)若
,且
,求AB.
![](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/78002bca853929365a3f58082f3e7637.png)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931168582852608/2931229048283136/STEM/c0f76a61bd1345beac28fba7fae41c65.png?resizew=273)
(1)求证:BA为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)当点B运动到使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c78a60b92d41cee22254ab0128d8282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bc8e50eeccced1d7f3bc52e09a7d03.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3beb5307dc32850e576a74198ac718a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐2】如图,将
的边
绕点
逆时针旋转得到线段
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/4d17c6e1-d02c-40cc-a63d-d2660fe89139.png?resizew=558)
(1)如图1,连接
,若
,
,
,
,求
的长;
(2)如图2, 点
在
上, 且满足
,连接
,点
为
上一点,连接
交
于点
,若
,
, 求证
;
(3)如图 3, 若
,
,
,点
在直线
上且满足
, 将
沿虚线
折叠使得点
的对应点
落在
上,连接
与折痕
交于点
,请直接写出
最小时,点
到
的距离.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/4d17c6e1-d02c-40cc-a63d-d2660fe89139.png?resizew=558)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ff58e0fc7269d3c2fd1b0f80b9cce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7bf90782fcc4f95cfc58b154996daa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e00668f797c9ce25d0f07e8f4f33a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图2, 点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5adc18ca424552b35ab939e9d57943e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f0816423dff0c19d5723b62df2a2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb83ce2a14c9ab7e16d3a8db97a28573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68382641b5e0cbaf624f70126d90ca06.png)
(3)如图 3, 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068282a29ef83d938714e8d19b963a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐1】综合与实践
根据以下素材,探索完成任务.
根据以下素材,探索完成任务.
如何设计纸盒 | ||
素材 | 利用一边长为![]() ![]() ![]() ![]() ![]() |
|
素材 | 如图,若在正方形硬纸板的四角各剪掉一个同样大小的小正方形,将剩余部分折成一个无盖的长方体盒子. |
|
问题解决 | ||
任务 | 初步探究:折一个底面积为![]() | 问剪掉的小正方形的边长为多少? |
任务 | 探究折成的无盖长方体盒子的侧面积能否为![]() | 如果能,求出此时剪掉的小正方形的边长;如果不能,说明理由. |
任务 | 图![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() 图 | 图![]() ![]() |
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】已知,BF为
直径,弦AB交弦CD于点E,连接AD、CF、BC,连接CG,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/c967b51d-4dea-49dc-acf0-bde239c554b6.png?resizew=394)
(1)如图1,求证:
;
(2)如图2,点G为BE上一点,连接CG,若
,求证:
;
(3)如图3,连接BD,
,过点A作
的切线交CF的延长线于点H,过点B作
,作
交BK于点K,连接DK,若
,
,求DK的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967578d2c4086aef3fda57ed4cdae5c0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/c967b51d-4dea-49dc-acf0-bde239c554b6.png?resizew=394)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
(2)如图2,点G为BE上一点,连接CG,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1568a16bd644873ab93bc2692d1ff615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8a40ec1aa71ee0b1e60f6449fe139.png)
(3)如图3,连接BD,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aabc8e4604f50df4cdfbf5ae4ca1e71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f73a2c3634cb942927fd8c716076bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287aa9198d03725e29da24c193aaf7f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7a3b9f5db27bee3a29868177a3547d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d02d932155e75f52ea78645603909a4.png)
您最近一年使用:0次