如图,在
中,
,
,
是斜边
的中线,
是射线
上的一个动点,连接
,将射线
绕点
逆时针旋转
,交射线
于点
.
(1)点
在线段
上时,
①求
的度数;
②线段
,
,
之间的数量关系为_______;
(2)点
在线段
的延长线上时,②中的结论是否还成立?若成立,请证明;若不成立,请写出新的结论,画出图形,并证明.
(3)若
,
,请直接写出线段
的长;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/d6a2bc5c-1b25-40fc-8e3f-b3bf152810e2.png?resizew=219)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433f37471cab3e125c71d011ef084d3c.png)
②线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6356e95ea855777f82363b1623ea42fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
2023·安徽蚌埠·一模 查看更多[2]
更新时间:2023-06-02 14:27:02
|
相似题推荐
解答题-证明题
|
困难
(0.15)
名校
【推荐1】已知
和
都为等腰直角三角形,
,点
为
上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/9f1960ee-56a5-4c1a-91a3-70191e66f067.png?resizew=570)
(1)如图1,
与
交于点
,若
,求
的值;
(2)如图2,连接
,交
于点
,求证:
;
(3)如图3,过点
作
的垂线交
于
,连接
,若
,请直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45de00f60ac1e6aa3a870635f5a7a46c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/9f1960ee-56a5-4c1a-91a3-70191e66f067.png?resizew=570)
(1)如图1,
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0428fcbb93632fa00e2f8930e210ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f9215613b7b05217ed77268c238391.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfa08445aac91bb4f71db0579753cc8.png)
(3)如图3,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4523f1b68a19e91e1dfe42f7b26cf69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9047d6c8cbf269602e754f2ec5923900.png)
您最近一年使用:0次
解答题-作图题
|
困难
(0.15)
【推荐2】已知
,
是
的平分线,将一个直角
的直角顶点
在射线
上移动,点
不与点
重合.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/73d7c4d1-ccc5-4375-9016-381557eabc37.png?resizew=173)
(1)如图,当直角
的两边分别与射线
、
交于点
、
时,请判断
与
的数量关系,并证明你的结论;
(2)如图,在(1)的条件下,设
与
的交点为点
,且
,求
的值;
(3)若直角
的一边与射线
交于点
,另一边与直线
、直线
分别交于点
、
,且以
、
、
为顶点的三角形与
相似,请画出示意图;当
时,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13caf1114acd460a55c5fa3bd06b07f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/73d7c4d1-ccc5-4375-9016-381557eabc37.png?resizew=173)
(1)如图,当直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13caf1114acd460a55c5fa3bd06b07f4.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(2)如图,在(1)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32160bacaba08677cfee2c1ba863f821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a941c616e262f1894715651150519568.png)
(3)若直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13caf1114acd460a55c5fa3bd06b07f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70834818750d0454474ac7c357cd287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】如图1,在正方形
的
边的延长线上取点
,以
为边作正方形
,连接
,取
的中点
,连接
,
.
(1)请说明线段
,
的关系,不必说理;
(2)如图2,把正方形
绕点
顺时针旋转,当点
在
上时,(1)中结论是否仍然成立?若成立,请说明理由;
(3)在旋转过程中,当D,E,F三点在一条直线上时,若
,
,请直接写出
的长.
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6956e80605da673953b2b0e9703efa22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/11/3e84f492-f477-4147-908f-923278e0eaa1.png?resizew=289)
(1)请说明线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
(2)如图2,把正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6956e80605da673953b2b0e9703efa22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)在旋转过程中,当D,E,F三点在一条直线上时,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25936291abb6432ed5a710ebf0ea195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8832c5450a61500ccbf73d95e16f449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
您最近一年使用:0次
【推荐2】在平面直角坐标系中,已知点
,线段
轴于A点,线段
轴于C点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc150998a4805bbb5333331ae92ea219.png)
.
(1)求A,B,C三点的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/19/f9140a34-ee3d-45b9-843b-e4ccc6c13c31.png?resizew=147)
(2)若点D是BC的中点,点E是线段OD上一动点,记点E的横坐标为m,请用含m的代数式表示△
的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/19/09285942-f365-4e88-952f-a353c345eec1.png?resizew=147)
(3)在(2)的条件下,当点E运动到OD的中点处时,请在y轴上确定一点P,使得
为等腰三角形,直接写出P点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c608365fb066f4a93301433b445330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2485101d50dd5eef3e4fb242adfca527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b45db8dd8768994af51206565379fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc150998a4805bbb5333331ae92ea219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74bf10927828511430b9f8d37c2ccc2.png)
(1)求A,B,C三点的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/19/f9140a34-ee3d-45b9-843b-e4ccc6c13c31.png?resizew=147)
(2)若点D是BC的中点,点E是线段OD上一动点,记点E的横坐标为m,请用含m的代数式表示△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/19/09285942-f365-4e88-952f-a353c345eec1.png?resizew=147)
(3)在(2)的条件下,当点E运动到OD的中点处时,请在y轴上确定一点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099dd87a526391f830ac2a11e7d7ad56.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/19/afb1dd34-2182-46e6-bdbe-ee02491dc615.png?resizew=147)
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1】如图1,在平面直角坐标系中,一次函数y
x﹣2的图象与x轴交于点B,与y轴交于点C,二次函数y
bx+c的图象经过B,C两点,且与x轴的负半轴交于点A.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923363666649088/2926320386269184/STEM/6eca56a3222b41f59537afbb5c3cbe8d.png?resizew=524)
(1)求二次函数的表达式.
(2)如图2,连接AC,点M为线段BC上的一点,设点M的横坐标为t,过点M作y轴的平行线,过点C作x轴的平行线,两者交于点N,将△MCN沿MC翻折得到△MCN'.
①当点N'落在线段AB上,求此时t的值;
②求△MCN′与△ACB重叠的面积S与t的函数关系式.
(3)如图3,点D在直线BC下方的二次函数图象上,过点D作DM⊥BC于点M,是否存在点D,使得△CDM中的某个角恰好等于∠ABC的2倍?若存在,求点D的横坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50a39604477d1d9326eb455cda2e838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7756682119a390deea0b2c4f1c3af8a6.png)
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923363666649088/2926320386269184/STEM/6eca56a3222b41f59537afbb5c3cbe8d.png?resizew=524)
(1)求二次函数的表达式.
(2)如图2,连接AC,点M为线段BC上的一点,设点M的横坐标为t,过点M作y轴的平行线,过点C作x轴的平行线,两者交于点N,将△MCN沿MC翻折得到△MCN'.
①当点N'落在线段AB上,求此时t的值;
②求△MCN′与△ACB重叠的面积S与t的函数关系式.
(3)如图3,点D在直线BC下方的二次函数图象上,过点D作DM⊥BC于点M,是否存在点D,使得△CDM中的某个角恰好等于∠ABC的2倍?若存在,求点D的横坐标;若不存在,请说明理由.
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
解题方法
【推荐2】如图,已知直线AB经过⊙O上的点C,并且OA=OB,CA=CB,
(1)求证:直线AB是⊙O的切线;
(2)OA,OB分别交⊙O于点D,E,AO的延长线交⊙O于点F,若AB=4AD,求sin∠CFE的值.
(1)求证:直线AB是⊙O的切线;
(2)OA,OB分别交⊙O于点D,E,AO的延长线交⊙O于点F,若AB=4AD,求sin∠CFE的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/b82cc13f-5f89-47d4-b81b-90eccdc17b19.png?resizew=368)
您最近一年使用:0次