1 . 已知正方形
为对角线
上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/c528c281-c683-488c-9c31-76ecd7870f67.png?resizew=470)
(1)如图①,连接
求证:
;
(2)如图②,点F是
延长线上一点,
,
交
于点G.
Ⅰ:判断
的形状并说明理由.
Ⅱ:若点G为
的中点,且
,求
的长.
(3)如图③,点F是DE延长线上一点,
,
交
于点G.
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54437040defadc43560cd2ccced267bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/c528c281-c683-488c-9c31-76ecd7870f67.png?resizew=470)
(1)如图①,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6294f8b30e51b13843e9166291217b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/191576fee601e7ab5bd9bd48e9c10708.png)
(2)如图②,点F是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0136a534af8311391c2a8e532614aa02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
Ⅰ:判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4da8c9541c01c2fa51788ed30cd6a9.png)
Ⅱ:若点G为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(3)如图③,点F是DE延长线上一点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0136a534af8311391c2a8e532614aa02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1484f6bf8eae600845e4c937fff6a260.png)
您最近一年使用:0次
2 . 如图
,菱形
中,
是对角线
上的点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/669f8532-0abc-4cdc-9eeb-38ddd1e1a0b1.png?resizew=148)
(1)求证:
;
(2)写出
与
之间的数量关系,再说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef227e3c17e425d6809b50489f83f50b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/669f8532-0abc-4cdc-9eeb-38ddd1e1a0b1.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5989e32f69a053f4042737e3d663e931.png)
(2)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edbd1aa951458ec8c30393d52d7789f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
您最近一年使用:0次
3 . 操作:我们知道等腰三角形是轴对称图形,至少有一条对称轴如图,在等腰
中,
,用尺规在图
中作出
的对称轴
方法与图
、图
不同,保留作图痕迹,不写作法
.
探究:如图
,在等腰
中,
,
于点
,
,点
为边
上一点,
,求
的长.
探究:在等腰
中,
,点
,点
分别为边
、
上一点,
,若
,
,求
的长.
您最近一年使用:0次
名校
4 . 如图,正方形
边长为6,E是
的中点,连接
,以
为边在正方形内部作
,边
交
于点F,连接
,则下列说法中:①
;②
;③
;④
.正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/84316505-3bb8-4aa9-9966-59db5d5d92c1.png?resizew=132)
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7c8630dc73828eec20b778072909fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24dfa37067ff455888ebe076eeb1fb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ade06068471a9d76e32b417bef7551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fadc445ec6f2defdb6009f5ddf3531d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/84316505-3bb8-4aa9-9966-59db5d5d92c1.png?resizew=132)
A.①②③ | B.②④ | C.①④ | D.②③④ |
您最近一年使用:0次
5 . 如图,
,E为
上一点,
,并且
.若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba0db442bddfa899bc89e15459e58e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb5314d911b5a764790da7edff43980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51e114946a52a5621d4e9b73165fa28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605f2976297a0deaa1602ef09d6a5afa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/200ce946-d552-45cf-a238-8c6520a899c8.png?resizew=151)
您最近一年使用:0次
6 . 通过类比联想、引申拓展研究典型题目,可达到解一题知一类的目的.下面是一个案例,请补充完整.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/9/9f67a4a3-97bd-42ac-bc69-005b55a4bdc1.png?resizew=550)
原题:如图1,点
分别在正方形
的边
上,
,连接
,则
,试说明理由.
(1)思路梳理
∵
,∴
,点
共线,
证明
得
.
请按此思路说明原题中
的成立的理由.
(2)类比引申
如图2,四边形
中,
,点
分别在边
上,
.若
都不是直角,则当
与
满足怎样的关系时,仍有
;请说明理由.
(3)联想拓展
如图3,在
中,
,点
均在边
上,且
.猜想
应满足的等量关系,并写出推理过程.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/9/9f67a4a3-97bd-42ac-bc69-005b55a4bdc1.png?resizew=550)
原题:如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20cb2c77ea29b6eabbc477bc3743859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9af98a1a048b1e2f7c71e83c33498c.png)
(1)思路梳理
∵,∴把
绕点
逆时针旋转
至
,可使
与
重合.
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5f3f3a373a2be95b03ae4ef9215db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b786297e18a79a55cfb976a1435ec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56271614cb7e00c677d3e8b6faff24e5.png)
证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94cb21b1fcfa6e188e0ba5161edd1c92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9af98a1a048b1e2f7c71e83c33498c.png)
请按此思路说明原题中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9af98a1a048b1e2f7c71e83c33498c.png)
(2)类比引申
如图2,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e23d4d632a7daad1e1f3e87b640e638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20cb2c77ea29b6eabbc477bc3743859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5b8de60ccfc78eb7707d1e22ca0de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9af98a1a048b1e2f7c71e83c33498c.png)
(3)联想拓展
如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e794eb0d9121a96f63d3094ea8f999e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76805974fefbe166b90d260e822ab5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc6c2fb98c91585d0b97eb04597849d.png)
您最近一年使用:0次
名校
7 . 已知在
中,
为
边的中点,连接
,将
绕点
顺时针方向旋转(旋转角为钝角),得到![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b9eee8c679265fa0291cc077209713.png)
,连接
,
.
(1)如图1,当
且
时,则
与
满足的数量关系是 ;
(2)如图2,当
且
时,(1)中的结论是否仍然成立?若成立,请写出证明过程;若不成立,请说明理由.
(3)如图3,延长
到点
,使
,连接
,当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e37b122a7273e1251ea3860e74c896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bec86a74ad3d806baac74e7fa59f942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b9eee8c679265fa0291cc077209713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa717a8a2558f1deb4e284347a0a7c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421456e82c859184328587723f85034d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421456e82c859184328587723f85034d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19818ce9d0765c2ead476eb9a67718a4.png)
(3)如图3,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e37b122a7273e1251ea3860e74c896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657f51cb443f86e5beced4423e7b25a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa717a8a2558f1deb4e284347a0a7c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e34f3fbb1adf23cf81d7005f4387a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
您最近一年使用:0次
8 . 【基础巩固】(1)如图1,
中,点D,E在边
上,
,
,求证:
;
【尝试应用】(2)如图2,
中,点E,F在对角线
上,且
,求证:
;
【拓展提高】(3)在(2)的基础上,若
,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f8592b15fc64f33be4fc80c5053c6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1c1124252175a195949c89409c0f37e.png)
【尝试应用】(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91017ae019041795e53ddf4dd386c575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d1125b47dec1c5e93143ee59ad862a.png)
【拓展提高】(3)在(2)的基础上,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e7c422a19b68b8b4cd484d22897e3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df678c4a265d54ee028e750d74d67a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8c16febdbd7a854fbb52d25e740ec2.png)
您最近一年使用:0次
2024-03-20更新
|
103次组卷
|
2卷引用:2023年浙江省宁波市中考全景复习模拟试题(三)
9 . 如图,在
中,
,
,点D在线段AC上移动,点E在
射线上,满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/3d586c9e-1e71-40d1-a217-47f2025b64e9.png?resizew=531)
(1)求证:
.
(2)如图2,过点B作
,过点D作
,垂足分别为G,F,
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce25e95729c34d26e482512d36dd89b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/3d586c9e-1e71-40d1-a217-47f2025b64e9.png?resizew=531)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1976e2a7028cacd09bd7a83ca89bd23.png)
(2)如图2,过点B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d95b61ec1e624487162d4d739ceb48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8689d619c2508c9000531fc1b8f1f21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26ef80b549c1ab7371f69c40940c235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668d2e6b2bb1d9516f383db02e55c3d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
您最近一年使用:0次
10 . 如图,在正方形
中,
是边
上一点,
是
延长线上一点,连接
交对角线
于点
,连接
,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbde88c76a98a051a13e1b83df8cbd15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b846f6f8a3c721825f2ca488fc7f0d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-20更新
|
840次组卷
|
8卷引用:重庆市云阳县沙沱镇初级中学2023-2024学年九年级上学期期中数学试题
重庆市云阳县沙沱镇初级中学2023-2024学年九年级上学期期中数学试题重庆市渝北实验中学校2023-2024学年九年级下学期数学3月月考模拟试题重庆市渝北区六校联盟2023-2024学年九年级下学期第一次月考数学试题2024年重庆市渝北区 九年级下学期教学大练兵数学试题2024年广东省广州市越秀区中考二模数学试题重庆市渝北区2022-2023学年八年级下学期期末数学试题(已下线)期中押题卷01-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(山东专用)(已下线)期末真题必刷04(压轴选填60题12个考点专练)-2023-2024学年八年级数学下学期期末考点大串讲(人教版)