名校
1 . 如图,等腰
中,
为
的外接圆,点
在弧
上,连接
,
,
.
(1)如图1,求证:
;
(2)如图2,过点
作
的垂线交
于点
,垂足为点
,若
,且
,求证:
;
(3)如图3,在(2)的条件下,在弧
上取一点
,连接
并延长交
于点
,连接
,延长
至点
,使
,连接
,若
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c9bce67850e25759386553275f90ff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/b48ed218-d4b4-46f1-b668-b912d7e180b7.png?resizew=128)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/a3530fe3-7af2-4213-9fc9-29e08ba9b364.png?resizew=134)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/9801ddd4-a1e9-4b7f-98a1-f367b1f273ae.png?resizew=157)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf79368e0dca255bf8a2ca0ed9f7a9e9.png)
(2)如图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d343b617f0e7b6e1468010bed6b4604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f474057fed7971e2236c24574131bdd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2016a09874dbb025738f4c61ab8b64f.png)
(3)如图3,在(2)的条件下,在弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ea03bf73cfbd991f8a271478a22048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6730204a4beaf026e959ea2f2f8e73bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fece41437b7637dfc85deb716a5b9c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa7387455989884544c6d047ba0a096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
名校
2 . 定义:有一组对角相等的凸四边形叫做“准平行四边形”.例如:凸四边形中,若
,则称四边形
为准平行四边形.
(1)如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045b85674bbe01e477c76501affed905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ba22b69231ffb2878458c15c51bd90.png)
(2)如图②,准平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c06e36ec59fa93ac857e35796a4b8311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4009aa13093cc3865dcd51b371892160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5755afc235f06b6a6c8624aaa0a6aa5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2023-10-19更新
|
261次组卷
|
3卷引用:江苏省 南通市 崇川区南通市新桥中学2022-2023学年九年级上学期第一次阶段性集中作业数学试题
解题方法
3 . 如图,在
中,
,点
为线段
一点,连接
,将
绕点
旋转至
,连接
和
(
).
(1)如图1,若
,
,点P是
延长线一点,连接
,若
,
,
,求
的长;
(2)如图2,
,作
于点
交
于点
,求证:
;
(3)如图3,在(2)的条件下,若
,点
是直线
上一动点,连接
,当点
运动到
中点时,将
沿
翻折至
,连接
,请直接写出
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b1267f69c7dffa11317ab19ab906cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/7/094e73f7-4a50-4bf6-8360-915501282987.png?resizew=531)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211b02854c44066a2386ddaab7295b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d2d3643a9579f2c693ef86909441e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e793c0cbdbee012be84eabfb1e4007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/919c656acb682df528da14856761198a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaa1101176c34e336eb0faceae10e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e68633cbbe3cc2d0801305f81a7aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ac03e0b1559d3a64fefe22b807f6f2.png)
(3)如图3,在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbbf4f6e16b3c25ec5f87b34adce52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.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/c87b61c3a4b98899979151c7584147e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d149eaa8b8f87a0e0a0b9fdb51760dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d226aef207ce71a381d6f63801cc9d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed62c9e98e81e76e4c0bd6202451d0a.png)
您最近一年使用:0次
21-22九年级·浙江·自主招生
4 . 如图1,P为第一象限内一点,过P、O两点的
交x轴正半轴于点A,交y轴正半轴于点B,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/533210ff-efdd-44ca-9186-69e3946a242a.jpg?resizew=455)
(1)求证:
平分
;
(2)作
交弦
于H;
①若
,求
的长;
②若
,把
沿y轴翻折,得到
(如图2),求
的长(用含m,n的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f616c47598448fd26708902db12f19a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/533210ff-efdd-44ca-9186-69e3946a242a.jpg?resizew=455)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
(2)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1759649dc8e1c0d1f05b9333a07166d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1613aefa0526b1621363b90df8325a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c81f349ae3d13f626deef22a9d89ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5dd6306e00de2ae82d6605308792db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d83893e4af15da16238420056ade371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d3ee4a2510c4c5091513b3ab2dca6f3.png)
您最近一年使用:0次
5 . 如图,在
中,
,D、E分别是AB、BC上的点,过B、D、E三点作
,交
延长线于点F,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/7b0f804d-21e7-4810-8945-5c76ebf3b676.png?resizew=188)
(1)求证:
;
(2)当
与
相切于点D时,求
的半径;
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114c5bb1bd1d1b0074db8716b9a409f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd0c00f62c22e90e7d542a2f8dd83d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cdd5aafca6ffa00e05eab101031752b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2436591a889729b1a3bdcca1991a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/7b0f804d-21e7-4810-8945-5c76ebf3b676.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502f735ac064e66e196ad885ed697db9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993238899f178516f13d9cf525b90ecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次
6 . 在四边形
中,对角线
,
相交于点
,将
绕点
按逆时针方向旋转得到
,旋转角为
,连接
,
,
与
交于点
.
(1)如图1,若四边形
是正方形.请直接写出
与
的数量关系和位置关系.
![](https://img.xkw.com/dksih/QBM/2022/12/19/3134259420848128/3134457300934656/STEM/5d6ffcd982564e52b446a28c0ba91df8.png?resizew=196)
(2)如图2,若四边形
是菱形,
,
,判断
与
的数量关系和位置关系,并给出证明;
![](https://img.xkw.com/dksih/QBM/2022/12/19/3134259420848128/3134457300934656/STEM/815b7cf3da0945ee9afeb29bb2f82536.png?resizew=201)
(3)如图3,若四边形
是平行四边形,
,
,连接
,设
,请直接写出
的值和
的值.
![](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/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb964f92ced4fb4180cfb80d53a37db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a19d119e7b5def3c2daf784de0b938c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)如图1,若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://img.xkw.com/dksih/QBM/2022/12/19/3134259420848128/3134457300934656/STEM/5d6ffcd982564e52b446a28c0ba91df8.png?resizew=196)
(2)如图2,若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://img.xkw.com/dksih/QBM/2022/12/19/3134259420848128/3134457300934656/STEM/815b7cf3da0945ee9afeb29bb2f82536.png?resizew=201)
(3)如图3,若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18444ec3e5e3b8a0cf488732c34866d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227fab53bdd94363eda3713fa485b0a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc4a7fbbcdae8ffb4ddfa813268054ca.png)
![](https://img.xkw.com/dksih/QBM/2022/12/19/3134259420848128/3134457300934656/STEM/78cf7966a733444f96f21a800d172efa.png?resizew=259)
您最近一年使用:0次
7 . 如图,以
的直角顶点
为坐标原点,
所在直线为
轴,建立平面直角坐标系,
为
的中点,将一个足够大的三角板的直角顶点与
重合,并绕点
旋转,直角边
、
与边
、
相交于
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/703e71b6-75cd-4fe3-a1ce-242920de7b54.png?resizew=460)
(1)如图
,当
时,请直接写出线段
与
的数量关系:______ .
(2)如图
,当
时,请直接写出
与
的数量关系:______ .
(3)当
时,猜想
与
的数量关系
用含有
的式子表示
,并结合图
证明你的猜想.
(4)若
,
,
为
的内心,结合图
,判断
是否在双曲线
上,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.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/2022/12/7/703e71b6-75cd-4fe3-a1ce-242920de7b54.png?resizew=460)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a577bd781af776dfe8bb469efbab1c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b136c45d114d9432aa492909cda4f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9dc8af1ac7d97a1b55e97b69d87669f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434845564fd5765244f8d1aa9240fa39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03f416cb4d50a5f473df4bbceeb3094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85410ff00c81839ff9a64bf86dc36f5e.png)
您最近一年使用:0次
名校
8 . 已知
,
,
,点
线段
中点,连接
.
为平面内一点,将线段
绕点
逆时针旋转
得到线段
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/3b392667-b0f4-4b71-996d-b19b45a6ecd4.png?resizew=654)
(1)如图1,当点
在线段
上时,线段
与线段
交于点
,若
,
,求
的面积;
(2)如图2,若点
在
的内部连接
、
,线段
交线段
于点
,当
时,
求证:
;
(3)如图3,过
作
的平行线,交直线
于点
.连接
.将
沿
翻折得到
,当线段
最短时,直接写出此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/3b392667-b0f4-4b71-996d-b19b45a6ecd4.png?resizew=654)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6cd95a30209fdfd859db138768d1d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55d76905ac2451077244e5cea42e173c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65092140faebed69b87e5a134703407c.png)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba47906b1c55990f2c0ca31d656b774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdfba2c28993f30534f45cd5647e178.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bb21dc493f7b8b44570c008db21caf8.png)
(3)如图3,过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b580a7588a936538a5d33d9aead78435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1048daeb69574ab2f2181d998f9267d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a564f9a88b171a3555a7cb439a5e39a7.png)
您最近一年使用:0次
9 . 如图,
中
,
,
中,
,
,直线
与直线
交于点F.现将
绕点C旋转一周,在旋转过程中,
______
,线段
长度的最大值是______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a522d816908f453cbcb721eb7aea91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eba7e2cb2e2390673b83bde332973d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4cc8a761ba260b010a138ac38dd8746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/127eef97aeb02eb6610a149fdb9bf9ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/dbf08f93-aefc-4ed4-8998-8527e490ee10.png?resizew=162)
您最近一年使用:0次
2022-11-04更新
|
423次组卷
|
3卷引用:江苏省无锡市惠山区2022-2023学年九年级上学期期中数学试题
江苏省无锡市惠山区2022-2023学年九年级上学期期中数学试题湖北省黄石市还地桥教联体2022-2023学年九年级下学期开学考试数学试题(已下线)(期中期末真题汇编)第24章 圆 (分层精练)-【题型分类精粹】2023-2024学年九年级数学上学期期中期末复习讲练系列【考点闯关】(人教版)
名校
解题方法
10 . 【数学概念】
我们把存在内切圆与外接圆的四边形称为双圆四边形.例如,如图①,四边形
内接于
,且每条边均与
相切,切点分别为E,F,G,H,因此该四边形是双圆四边形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/593be872-2855-4897-9bb5-34fca20410a5.png?resizew=398)
【性质初探】
(1)双圆四边形的对角的数量关系是___________,依据是___________.
(2)直接写出双圆四边形的边的性质.(用文字表述)
(3)在图①中,连接
,
,求证
.
【揭示关系】
(4)根据双圆四边形与四边形、平行四边形、矩形、菱形、正方形的关系,在图②中画出双圆四边形的大致区域,并用阴影表示.
【特例研究】
(5)已知P,M分别是双圆四边形
的内切圆和外接圆的圆心,若
,
,
,则
的长为___________.
我们把存在内切圆与外接圆的四边形称为双圆四边形.例如,如图①,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/593be872-2855-4897-9bb5-34fca20410a5.png?resizew=398)
【性质初探】
(1)双圆四边形的对角的数量关系是___________,依据是___________.
(2)直接写出双圆四边形的边的性质.(用文字表述)
(3)在图①中,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0072b7d7e743506038a8c3739651a96.png)
【揭示关系】
(4)根据双圆四边形与四边形、平行四边形、矩形、菱形、正方形的关系,在图②中画出双圆四边形的大致区域,并用阴影表示.
【特例研究】
(5)已知P,M分别是双圆四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
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