名校
1 . 如图,
中,在平面内将线段
绕点A逆时针旋转
得到线段
,过点D作
,分别交
、
于点E、F,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/91e1e8eb-5a9b-4b27-b5d8-b4b2d9743989.png?resizew=521)
(1)如图1,若
,
.求
的长度.
(2)如图2,若
,求证:
.
(3)如图3,在(2)问的条件下,若
,点P在射线
上运动,当
取得最小值为
时,在平面内将
绕点B逆时针旋转
度得到
,当点
恰好在线段
上时,请直接写出
的面积的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/91e1e8eb-5a9b-4b27-b5d8-b4b2d9743989.png?resizew=521)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9693033557682abfd0bb71890fe2236e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7317d43414d8d968f0cb11f533f1de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3313d2e682cf6220773ede4ef5a1630a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1cc7b820262053106a65b544e09996.png)
(3)如图3,在(2)问的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c786b48d3aff4d2f73f83cc1a32a094a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b11c09db2d6b7fe2af5b63b8ba8cc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb6f3d7540831a9e97d3b184a491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a76ffa820a9a8ad7f536e01773249a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/159c881d8a2ca3796076523b06c2806e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c98be77bbbdabbc0b804b407762a66.png)
您最近一年使用:0次
2 . 如图,已知,经过点
的直线
与x轴交于B点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/c7fb2f2f-e070-4bd2-9fe8-45f9960d66b9.png?resizew=146)
(1)求直线
的函数表达式;
(2)用尺规作图:经过点A,作直线
的垂线,交y轴于点E;
(3)在(2)完成的图中,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ec64d0616c70b9ecb87d645f1962fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf6a9ed20ac6dfd41dd3721a4a4f361.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/c7fb2f2f-e070-4bd2-9fe8-45f9960d66b9.png?resizew=146)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)用尺规作图:经过点A,作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)在(2)完成的图中,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5fc6ead6416492c231c320a5486f86.png)
您最近一年使用:0次
3 . 在
中,点D是边
上一点,连接
.
平分
,
,
,
的面积为3,求
的面积;
(2)如图2,若
,点E在
上,满足
,过点C作
于点C,交
的延长线于点F,若
,求证:
;
(3)如图3,在(2)的条件下,已知
,点P,Q分别是线段
上的动点,连接
,当
的最小值是n时,直接写出线段
的长.(用含m,n的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ddd49625097d0a78df7170be4f882e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7038aae787bf5074438bf03af5034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76aae027f86e42bd67347c3d2f9ac7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b53c188dd2357ec2195d87cecd20bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f34918a4f84fabc908c9f87df56f9330.png)
(3)如图3,在(2)的条件下,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0c26071fa1ebab92b8e750fd50d828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2b8ba4551feee62d4e3d55d1486ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e042291e9b287e94e2d24a7993e99a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79895b00d9d3d72995b8ee9aa54e98b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3137705cb4170baafa66ff46eefb7a.png)
您最近一年使用:0次
2024-01-24更新
|
118次组卷
|
3卷引用:重庆市南川区2023-2024学年八年级上学期期末考试数学试题
名校
4 . 如图:正方形
中,直线
经过点D,与
交于点E,
的垂线
,垂足为G,交
于点F,(请保留作图痕迹,不要求写作图过程)
(2)同学们作图完成后,通过测量发现
,并且推理论证了该结论,请你根据他们的推理论证过程完成以下证明:
如图:已知正方形
中,
分别是直线
,直线
被一组对边截得的线段,当
时,求证:
.
证明:∵正方形
,
∴
,
∴
,
∴
,
∵
,
∴
,
∴ ② ,
∴
,
在
和
中,
,
∴
,
∴
.
同学们进一步研究发现,一条直线被正方形的一组对边所截得的线段与另一条直线被正方形的另一组对边所截得的线段垂直时均具备此特征,请你依据题目中的相关描述,完成下列命题:两条直线分别被正方形的一组对边所截,若所截得的线段 ④ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)同学们作图完成后,通过测量发现
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1db2c0955e5a5be47faf855bca738a4.png)
如图:已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b795e2cfa58b494fd8f5437b3db0d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f87b02b744534ae1ed700d21fcceb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1db2c0955e5a5be47faf855bca738a4.png)
证明:∵正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15416b74b2ecbcfa38cf34a9ffff730.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abcbc36009f894519c6d465358de5d2.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464a10f140976f4b63f793ff74c9d496.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f87b02b744534ae1ed700d21fcceb4.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d24b556e392436e0eb111d3c13c336e.png)
∴ ② ,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491b7a0cb6fb1af16947c7e06b749fe2.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5674c0eebfe39bafb7a37998f8bff6.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911a4f78c778a5dd7aa3ba9dd8afaad3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1db2c0955e5a5be47faf855bca738a4.png)
同学们进一步研究发现,一条直线被正方形的一组对边所截得的线段与另一条直线被正方形的另一组对边所截得的线段垂直时均具备此特征,请你依据题目中的相关描述,完成下列命题:两条直线分别被正方形的一组对边所截,若所截得的线段 ④ .
您最近一年使用:0次
5 . 学习了平行四边形后,小庆进行了拓展性探究.他发现,过一个顶点同时向平行四边形的两边作垂线段,如果这两条垂线段相等,那么这个平行四边形是菱形.其解决问题的思路是通过证明平行四边形的一组邻边所在的三角形全等即可得出结论.
请根据他的思路完成以下作图和填空.
用直尺和圆规,过点C作
边上的垂线,垂足为点F.(只保留作图痕迹)
已知:如图,在
中,
于点E,
于点F,
.
是菱形.
证明:∵四边形
是平行四边形,
∴
①.
又∵
,
,
∴
.
又∵②,
∴
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304550f4dccca7123548911ac7308ac5.png)
∴④.
又∵四边形
是平行四边形,
∴四边形
是菱形.
请根据他的思路完成以下作图和填空.
用直尺和圆规,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
已知:如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e68633cbbe3cc2d0801305f81a7aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac679f877d3e3b3acef1f1f8e3654b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
证明:∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7960538cb70fcf641b94864a90190d.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e68633cbbe3cc2d0801305f81a7aa86.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72df9ea8e20b8cba49854ec760135b10.png)
又∵②,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e1d0283713f01611171a93cabcd8d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304550f4dccca7123548911ac7308ac5.png)
∴④.
又∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
名校
6 . 在
中,
,点
是边
上一动点(点
不与点
、
重合),连接
.
,求
的长;
(2)如图2,将线段
绕
点顺时针旋转
至
位置,连接
,过点
作
的垂线交
于点
,求证:
;
(3)如图3,以
为直角顶点,在
下方作直角
,点
为
的中点,连接
,点
为
的中点,连接
,若
,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6470a8f2500b3a7ca541a22819bf303.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/8455657dde27aabe6adb7b188e031c11.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6e05c1c212a024b5b1dbb7a9495f93c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图2,将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ec9d8556300a772755fbbeb0a0e0e1.png)
(3)如图3,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a1219bc313db46b07bbd68600267a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9768ddac5abd1d1b451b73940e4d27be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
您最近一年使用:0次
2024-01-20更新
|
807次组卷
|
2卷引用:重庆市第八中学校2023-2024学年八年级上学期期末考试数学试题
名校
7 . 如图,矩形
中,
为其对角线.过点
作
于点
.
,使
,
交
于点
,交
于点
;
(2)小明思考此时的DF是否会垂直
,为了探究这个问题,小明尝试利用证明三角形全等来推导
.根据小明的思路,完成以下填空:
证明:∵四边形
是矩形,
,①,
.
在
和
中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976a4ec0841c127653204ca0126a2190.png)
∴
,
∴③.
∵
,
∴④,
,
∴
.
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f34868b311f1082fb003dec7f07cdfd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c01518bd608069d449dfe185f1fccea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/895dc3dc3a6606ff487a4c4863e18509.png)
(2)小明思考此时的DF是否会垂直
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
证明:∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb32f2d5c9fb0227f67dce1a912a399.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4739cf752ddc11dda0b10ec8a76876.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976a4ec0841c127653204ca0126a2190.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9927f0e40c14fc654b296a4e2109fe6.png)
∴③.
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
∴④,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa2f71a42726b0c1bc116515c1a78bd.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
您最近一年使用:0次
名校
8 . 在平面直角坐标系中,已知点
,点
,连接
,
平分
交
于点C,点E为x轴上一动点.
(1)如图1,过点E作
交
于点D,若点D为
中点,且
,
,求
的长度;
(2)如图2,连接
,过点C作
且
,
交x轴于点F,连接
,若
,
,求
的值;
(3)如图3,连接
,过点A作
交
的延长线于点N,交y轴于点M,连接
,若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d8e820de039970450591eea09c1d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd06d4b3e9eb84cb458491e8cf75e517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/b7f4c3a6-30a6-480e-93b7-d8685d1ebb0c.png?resizew=682)
(1)如图1,过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/591d6791a8e1be17522af962373a47ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0db2c49919467a2e14540f2aabd05cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63d8cb3145141f2e678356659c1d639.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/050c92d17a9a6c124116020086170a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a9581c7372aec0035259b1fed2fd0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6de38783b0012b5033f54e08136558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac0e7c8b7df26485755ffdc7c45f89d.png)
(3)如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f6789ed3135c1e0af1f645a420e4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8acb18301f05f15691cd0c267efa859a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedf93beec809182ff56885c77cf18a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b208e1e8ca89c369dfa22871a0754b.png)
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9 . 在
中,
于点
,
平分
,点
在
上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/2959634d-d1a6-4d73-85fe-b438b566a2c6.png?resizew=499)
(1)如图1,求证:
;
(2)如图2,若
,求证:
;
(3)如图3,在(2)的条件下,作
,交
的延长线于点
,连接
,交
的延长线于点
,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24ad0a87392245e4bf5bafe26089803b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413d8d82deb8f0ee10703db2bd156921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b01bda4434edd6bd0b5b00a86631cc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/2959634d-d1a6-4d73-85fe-b438b566a2c6.png?resizew=499)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48ebd808c7c32b2492f9edac0c11801.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6271c1dbb137195d0862fbd8ae84e2d9.png)
(3)如图3,在(2)的条件下,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13236eaad1e3e7714955b026a3f44b21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2b942ea660701a3761f8bbf0dc7de5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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10 . 如图1,
为等腰直角三角形,
,点D为
外一点,连接
,过点A作
,交
于点E,过点D作
,垂足为H,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/9445e2b2-a973-4e1e-a200-0f9f034b78b7.jpg?resizew=516)
(1)求证:
;
(2)如图2,延长
到点G,连接
,使得
,F为
上一点,连接
,若
.求证:
;
(3)如图3,点K在
内,连接
,当
的值最小时,直接写出
的值.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b1472e121da0ae5550329cfda5f0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7cf70f8772d8fea4599b18df2c88f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65dcc03dc69a20ba0633035e5b8abb80.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/9445e2b2-a973-4e1e-a200-0f9f034b78b7.jpg?resizew=516)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
(2)如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe2f29525e291cef0b5eeacc376971c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d683d01ac4de4926c0d40a50e3e13c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9527f2c123dfba738f18780be451c52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc8625de9f2181d147f180439387813.png)
(3)如图3,点K在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633e0d013dc0b31935608b1e88d1a29f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e80e02e9093c11658f761cc2c79dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a441fa2496e43f66c43a20a5b2682b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccc376ed93fb7d32b932c975040ac19.png)
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2024-01-03更新
|
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2卷引用:重庆市开州区开州区云枫初级中学2023-2024学年八年级上学期12月月考数学试题