如图,在等边
中,
,点
为
的中点,动点
分别在
上,且
,作
的外接圆
,交
于点
.当动点
从点
向点
运动时,线段
长度的变化情况为( )
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897210449666048/2979481404604416/STEM/bfb65d89-e8ef-472c-a4b6-a9f51b181556.png?resizew=156)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.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/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b2f9aa11a47087e5fc483cf712ca9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83fd42df335c85bf92b7961b9851977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897210449666048/2979481404604416/STEM/bfb65d89-e8ef-472c-a4b6-a9f51b181556.png?resizew=156)
A.一直不变 | B.一直变大 | C.先变小再变大 | D.先变大再变小 |
21-22九年级上·浙江宁波·期末 查看更多[8]
浙江省宁波市江北区2021-2022学年九年级上学期期末数学试题(已下线)第05讲 确定圆的条件-【暑假自学课】2022年新九年级数学暑假精品课(苏科版)江苏省苏州市苏州中学2022-2023学年九年级上学期10月月考数学试题(已下线)第15讲 确定圆的条件-【帮课堂】2022-2023学年九年级数学下册同步精品讲义(北师大版)(已下线)期末难点特训(三)选填压轴50道-【微专题】2022-2023学年九年级数学下册常考点微专题提分精练(浙教版)(已下线)浙江省温州市部分学校2022-2023学年九年级上学期数学期末试题变式题1-5(已下线)第08讲 确定圆的条件(2种题型)-【暑假自学课】2023年新九年级数学暑假精品课(苏科版)江苏省苏州市姑苏区胥江实验中学校2023-2024学年九年级上学期12月月考数学试题
更新时间:2022-05-14 23:13:20
|
相似题推荐
单选题
|
较难
(0.4)
【推荐1】如图, 以
的两条直角边向内分别作两个等边三角形
与
,连接
, 若
, 则下列叙述正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/a6a8f152-12a1-464e-b1fd-804cb6f3ea81.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7281b641656a5992abaafb4190ca9afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d16a4959a99193a52d6fa8648cb2eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96cff8a1b63eafdc6750377f3183064b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1feb860364206d6d81f78581d0e4cef9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/a6a8f152-12a1-464e-b1fd-804cb6f3ea81.png?resizew=164)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐2】如图,线段
,点
是线段
上的动点,分别以
为边在
作等边
、等边
,连接
,点
是
的中点,当点
从点A运动到点
时,点
经过的路径的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acf9e2f45e625cbc6d26dd5e292edd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983add910c8e09954f164a5e87d1f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/7/9c422644-2e11-4fe3-bfa6-7a90c8673e61.png?resizew=150)
A.3 | B.2.8 | C.2.5 | D.2 |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐1】如图,在
中,
,
,点
为
的中点,点
在
上,且
,将
绕点
在平面内旋转,点
的对应点为点
,连接
、
,当
时,
的最大值为( )
![](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/044a9cab96df01ffe6f14d57ca5273d2.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ae300e4ff3e89d0e1e5671eacd9585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc284c797f4e7ee59dba9472447be8bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
A.2 | B.![]() | C.5 | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐2】如图,在矩形
中,
,
.点O为矩形
的对称中心,点E为边
上的动点,连接
并延长交
于点F.将四边形
沿着
翻折,得到四边形
,边
交边
于点G,连接
,则
的面积的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c76e6c67644b8bad9bfe11c7ec3081d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968b886a9f161fdcab1e08cba8ece5d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5e8556faa32877bdd2f6c8c5f5d497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6b5467a0e7f61e3b07958da5f47cb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/b35752c6-9159-4f97-b15b-003f59f52846.png?resizew=168)
A.18-3 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
名校
【推荐1】如图,在等边
中,
,点
,
分别在边
,
上,且
,连接
,
交于点
,连接
,则
的最小值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/f456f71b-403d-45a0-9071-d51a633e4d1f.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d1b7c032d7ee8ac72e3e9c1c2395c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.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/918487059b838915eefdc99287cb0855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/f456f71b-403d-45a0-9071-d51a633e4d1f.png?resizew=145)
A.2 | B.3 | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐2】如图,
中,
,
,
,⊙
是
的外接圆,D是优弧AmC上任意一点(不包括A,C),记四边形ABCD的周长为y,BD的长为x,则y关于x的函数关系式是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/268dba49-2028-47b9-9034-c79273d40681.png?resizew=133)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐1】如图,圆O的半径为R,正
内接于圆O,将
按逆时针方向旋转
后得到
,它的两边与AB相交于点D、E,则以下说法正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/27830545-a117-457c-89de-df25befe853a.png?resizew=191)
①
;②
;③
;④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee9a493cad9779a6748023c1fdf952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/27830545-a117-457c-89de-df25befe853a.png?resizew=191)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8568dcc4941b35affaec3e80f029e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a9f36aa35d0591808106912fcffe2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5400d82a31a498510ced85c7c67f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee9a493cad9779a6748023c1fdf952a.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐2】如图是由三个大小相同的正方形组成的“品”字型轴对称图案,测得顶点A,B之间的距离为5.现用一个等边三角形纸片将其完全覆盖,当此等边三角形面积最小时,则它的外接圆半径是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/24/7643d62a-914b-43ad-800e-539baeead0df.png?resizew=83)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次