名校
1 . 已知:
中,
是中线,点
在
上,且
.则
的值为( )
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed9e7c3c428f3648c1179adc0ccebe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0521a387124fdab7bbbe15d2e930acab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-21更新
|
682次组卷
|
17卷引用:2024年宁夏中考数学一模备考模拟考试试题
2024年宁夏中考数学一模备考模拟考试试题2023年安徽省c20教育联盟中考一模数学试卷2023年安徽省合肥市蜀山区五十中新校中考一模数学试卷安徽省合肥市第四十七中学2022—2023学年九年级下学期综合练习数学试卷安徽省合肥市第四十二中学2023-2024学年九年级上学期期末数学试题2024年海南省九年级数学中考模拟试题2024年西藏九年级中考数学一模考前模拟试题(已下线)安徽省 C20 教育联盟数学一模卷广东省惠州市惠阳区华南师范大学附属学校2023-2024学年九年级下学期第一次月考数学试题安徽省C20教育联盟2023年九年级第一次学业水平检测数学试卷2024年山东省青岛市中考数学模拟预测练习题2024年云南省九年级学业水平考试数学模拟预测题(已下线)重难点02相似三角形四种模型(模型解读+典例剖析+培优争分练)-2024年中考数学【热点·重点·难点】专练(安徽专用)(已下线)热点05三角形(6大考点+重难通关练+培优争分练)1-2024年中考数学【热点·重点·难点】专练(安徽专用)2024年广东省广州市中考三模数学试题2024年广东省广州市中考模拟数学试题2024年北京首都师范大学附属中学中考模拟数学试题
2 . 如图,
中,
,动点
从点
出发,在
边上以每秒
的速度向点
匀速运动,同时动点
从点
出发,在
边上以每秒
的速度向点
匀速运动,运动时间为
秒
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/54840ee4-d1ce-495e-b08b-4c3594e111f1.png?resizew=310)
(1)是否存在某一时刻
,使
的面积是
面积的
?若存在求出相应的
值,若不存在,
请说明理由.
(2)在运动过程中,是否存在某一时刻
,使
是等腰三角形?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b2d17dd85c13ed60489b4cb386375b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577fb839669e9b32c0aa4b2a32335d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/54840ee4-d1ce-495e-b08b-4c3594e111f1.png?resizew=310)
(1)是否存在某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2b58424e893df4e01c912f87e09095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d41840af35e218a5639a2eff4d80b54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)在运动过程中,是否存在某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2b58424e893df4e01c912f87e09095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
3 . 等腰三角形的一条边长为4,另一条边长为6,则它的周长为( )
A.14 | B.14或16 | C.16 | D.18 |
您最近一年使用:0次
4 . 如图,在
中,
,以点
为旋转中心,将
绕点
逆时针旋转,得
,连接
,若
,则
的度数是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9693da3141d4af5e8deb0fd17dd5aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c021993da445858448d368df42554c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e2870190e0fca8e7fe64afb8137738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120c2a9c800ed0272c8f745930dd1bfe.png)
您最近一年使用:0次
2024-03-18更新
|
81次组卷
|
2卷引用:宁夏回族自治区银川市唐西中学2022-2023学年九年级下学期第四次联考数学模拟试题
5 . 如图:
中,
,
,
边的垂直平分线
交
于D,交
于点E,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2350fe8426a29f5dc63c7fdda29b2ea.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d777d15cd733338ecfd0ea63819f62c.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2350fe8426a29f5dc63c7fdda29b2ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/e7411306-3778-4d05-9cfd-436b999de9bf.png?resizew=101)
您最近一年使用:0次
6 . 如图,在
中,
,
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1e39bfb2f4be18735fc76997a96582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b528818e98c5c2ddf301048b4228d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/146e6cf8-0af5-457e-b8c2-a3d2d7799cca.png?resizew=127)
您最近一年使用:0次
7 . 如图,
是
的直径,直线
与
相切于点
,
,垂足为
.求证:
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13b505788d3d02bf232ac637fc3a8ee.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/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/81eade8a-56ea-4d17-bb17-d5077ff7b57b.png?resizew=160)
您最近一年使用:0次
8 . 一个等腰三角形,顶角是150度,腰长是4厘米,则这个等腰三角形的面积等于______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e31351d7b971bda5c97c662fc71103a.png)
您最近一年使用:0次
9 . 如图,
中,
,
,
,则
的半径等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/a9ba8943-582f-4580-826e-61206a185d34.png?resizew=77)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f8939f8c274cb26a8a6a5fa2469087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/a9ba8943-582f-4580-826e-61206a185d34.png?resizew=77)
A.5 | B.2 | C.4 | D.3 |
您最近一年使用:0次
2023-12-16更新
|
85次组卷
|
2卷引用:宁夏回族自治区吴忠市青铜峡市第六中学2023-2024学年九年级上学期期中数学试题
10 . 如图,四边形
中,给出下列三个条件①
;②
;③
平分
.请你以其中两个为条件,另一个为结论,推出一个正确的结论(只需写出一种情况),并加以证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/9afabc41-ae19-41af-9b54-add6c3ba1ecd.png?resizew=175)
已知:
求证:
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/9afabc41-ae19-41af-9b54-add6c3ba1ecd.png?resizew=175)
已知:
求证:
证明:
您最近一年使用:0次