1 . 如图,
,
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26891f01df7816ca874413643fff81a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934a9508c176f44bf58f88715bd98f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f03a43549ab71f0998fffbcb48397b00.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/f4398954-eb07-4113-860a-eb1146784f32.png?resizew=180)
您最近一年使用:0次
名校
2 . 如图,
是等边三角形
内一点,将线段
绕点
顺时针旋转
得到线段
,连接
.若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e9ad6d50f5a45dbd9f70b2a0fbdeef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/791f4df9-1b41-490a-a31d-67de8ba7c853.png?resizew=161)
(1)证明![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17062bfdc915eeceba02675ad0a6207.png)
(2)求三角形
的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e9ad6d50f5a45dbd9f70b2a0fbdeef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/791f4df9-1b41-490a-a31d-67de8ba7c853.png?resizew=161)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17062bfdc915eeceba02675ad0a6207.png)
(2)求三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1956db288a5a3b8c97d2539e9e5e4f85.png)
您最近一年使用:0次
3 . 已知,如图:
,
,要说明
,若以“
”为依据,还要添加的条件为 __________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f00f89f6fd05f521d05129244aa4e5e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61f3477e623aa4f924a82bd7a06ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a290f047f50481318d040c604d72f7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/63edf929-9f7d-4f24-82e0-7121870147c0.png?resizew=174)
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4 . 如图,
,
,则直接证明
的方法( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/820a2bf5-4137-4dc1-81a9-2c60fb03e435.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4009aa13093cc3865dcd51b371892160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b84c9371e4a03c80783e0ec52f60530.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/820a2bf5-4137-4dc1-81a9-2c60fb03e435.png?resizew=135)
A.有1种 | B.有2种 | C.有3种 | D.有4种 |
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5 . 如图,
,若要使
,应添加的关于边 的条件是______ .(只需填写一个正确条件)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/727fb03b-4e99-4419-a898-f6eb1b7ae0cb.png?resizew=116)
您最近一年使用:0次
6 . 看图填空:如图,已知
,
,试说明
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/4e9a72fd-4b64-4597-981a-fcc9493c5f8b.png?resizew=173)
证明:∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaae99b4ac308549134169e69247a6.png)
∴
(两直线平行,同位角相等)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
∴
;
即:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba00448a7a8f056d18789f6f72b7128.png)
在
和
中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2140df87bdcc6d156b8e0d83adb8fda5.png)
∴
( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaae99b4ac308549134169e69247a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76335cd6f228eb043106735304677e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca10806fc8c3c3efd6859f526b76900.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/4e9a72fd-4b64-4597-981a-fcc9493c5f8b.png?resizew=173)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaae99b4ac308549134169e69247a6.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665ffcdb7c57534dc184cc840471f2f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfd40973314819316eedefaf10eecad.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ec4e9bc9a667e8e4e5bd4f2ccc196b.png)
即:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba00448a7a8f056d18789f6f72b7128.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2140df87bdcc6d156b8e0d83adb8fda5.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca10806fc8c3c3efd6859f526b76900.png)
您最近一年使用:0次
7 . 如图,点
,
,
,
在一条直线上,
,
,只需添加一个条件______ ,即可证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958b45552f9fa1a60016483bd8246be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61f3477e623aa4f924a82bd7a06ce4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/9aebb8e6-c6b3-4b24-b621-8ec9530b9795.png?resizew=230)
您最近一年使用:0次
8 . 如图,在
中,点
是
的中点,作射线
,在线段
及其延长线上分别取点
,
,连接
,
.添加一个条件,使得
,你添加的条件是______ .(不添加辅助线)
![](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/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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f358b3182f937f67da213a8a27f3183.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/64c38c8d-7a82-4217-98f1-0f98ce081e63.png?resizew=141)
您最近一年使用:0次
名校
9 . 如图,点
,
在线段
上,
,
,
.
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57cfa2fe76009b2ea36df44b1f8bb4d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/3447a508-7299-4d13-ba9b-b044e08b7cfd.jpg?resizew=141)
您最近一年使用:0次
2023-12-17更新
|
123次组卷
|
2卷引用:福建省泉州市晋江市安海片区2023-2024学年八年级上学期期中数学试题
10 . 如图,把一长一短两根细木棍的一端用绳子绑在一起,使长木棍的另一端与射线
的端点B重合,固定住长木棍,把短木棍摆动,端点落在射线
上的C、D两点位置时,形成的
和
中有
,
,
,则
与
________ (填“全等”或“不全等”).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7189182cc23d759be2764d141952737b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f6c20b084a9b0fdad656f838cf9cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02f21f554b941f18170298daaba06e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7189182cc23d759be2764d141952737b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16a00ffc890ef8cfc038e5039983773.png)
您最近一年使用:0次