1 . 如图,在
中,
,
,
为线段
上一动点
不与点
、点
重合
,连接
,作
,
交线段
于点
以下四个结论:
;
当
为
中点时,
;
若
,则
;
当
为等腰三角形时,
其中正确的结论有______
填写正确结论的序号![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.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/640e9e7c56e8eeda044fb55396088816.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/fd995178601c2ad7b40f973d268c7bb7.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/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9608cad892644b4094ed6438b69572.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/6f70e392e12ac3eed1b5e46888db4e01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afa3bea496bfa318480a2c3d62822e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.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/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b34233772c4c26d6669499d9b1f15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8b8edd94bc4d5d517ec77e56800e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40eb09c7b8ace6a74bea0d28136177e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba4c5a16143a851b899ecb4b180887b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/1c053dcf-b985-47a2-9b80-4acbadd8b0b8.png?resizew=152)
您最近一年使用:0次
2 . 阅读下面材料:
已知:
,
,
,点
是
中点,给出下面四个结论:
①
;
②
;
③
;
④点
是
上的一个动点,当
取最小值时,
.
上述结论中,所有正确结论的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/159ed6b6-95c9-480a-839b-e7fbc79684af.png?resizew=184)
已知:
![](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/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e051da5c8aea7ef4a467bfaa07256b7.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e232e78cf783bc2028d658b2c27a5d.png)
④点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d754f5b394263f5089f76a64311b0f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccaba8c8bdc8ff3ed19f9c43ed3c199.png)
上述结论中,所有正确结论的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/159ed6b6-95c9-480a-839b-e7fbc79684af.png?resizew=184)
A.①②④ | B.②③ | C.③④ | D.②③④ |
您最近一年使用:0次
3 . 如图,把
放到平面直角坐标系
中,使得
,
.点
在
轴上且
.那么下列结论正确的是________ (填写序号).
①
;②
;③
;④
;⑤
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8362d054a769c541ee707e0c06cc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d660ced5a492a37056b08b858e199320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d85ba9942c79b942388db17a47a7da6a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa50346237f69307a6f08037562e67e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc045e53575a5332b65da11af812394a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf656518747f3ef4bf1a3014f1997f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947ab52c69e1bf1ce55c2f49e9f57fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8a8257c3e0ee20cd4626656af4af91.png)
您最近一年使用:0次
4 . 如图,在
中,
,
.作出
边的垂直平分线
,交
于点
,交
于点
,连接
.
(1)下列结论正确的是 (填序号).
①
平分
;②
;③
的周长等于
;④
.
(2)结论正确的说明理由.
![](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/236c72942e305dfdede4b4f44c650e59.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/ecd7de5a-e50e-4be7-9fa9-144c74a4446f.png?resizew=105)
(1)下列结论正确的是 (填序号).
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a9ec45721f7b4d1c99917ac0d970f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6151fb896230f2579d516af4c67e634a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
(2)结论正确的说明理由.
您最近一年使用:0次
10-11七年级·广西·期中
真题
5 . 有下列两个命题:①若两个角是对顶角,则这两个角相等;②若一个三角形的两个内角分别为
和
,则这个三角形是直角三角形.说法正确的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
A.命题①、②都正确 | B.命题①正确,命题②不正确 |
C.命题①不正确,命题②正确 | D.命题①、②都不正确 |
您最近一年使用:0次
2019-01-30更新
|
295次组卷
|
5卷引用:专题12.4 证明(全章直通中考)(综合练)-2023-2024学年七年级数学下册基础知识专项突破讲与练(苏科版) -
(已下线)专题12.4 证明(全章直通中考)(综合练)-2023-2024学年七年级数学下册基础知识专项突破讲与练(苏科版) -(已下线)2011年广西春季学期期中水平测试卷七年级数学(已下线)2011年初中毕业升学考试(广西贵港卷)数学(已下线)2011-2012学年湖北省黄石四中七年级下学期期中考试数学卷(已下线)2011-2012学年广东深圳安平中学七年级下学期期中考试数学卷
6 . 如图,
,
是线段
上一点,
是线段
的延长线上一点,
的平分线
交
于点
,交线段
的延长线于点
,过点
作
于点
,且
.下列结论:
;
②
;
③
;
④若
,则
.
正确结论的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d786ee723231d4ca87eb9d011a378b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386b6c79bf55aefffd84094e6f1699a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc22b5a86423632e0b7bd9461db60ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923b7bf025063b05b38fe7873d2a8e1b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14548392f6c97bb0630c94d974b5bd81.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c73a5f1fb6c83dad0a651c68e87d27.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3703f09a83830b97ece420f502380718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f2f745cb89cb6607e9444b6df021cb.png)
正确结论的序号是
您最近一年使用:0次
2023-06-08更新
|
199次组卷
|
3卷引用:专题03平行线的性质(七大题型)-【好题汇编】备战2023-2024学年七年级数学下学期期中真题分类汇编(人教版,湖北专用)
(已下线)专题03平行线的性质(七大题型)-【好题汇编】备战2023-2024学年七年级数学下学期期中真题分类汇编(人教版,湖北专用)湖北省荆门市外语学校2023-2024学年七年级下学期期中数学试题湖北省武汉市江汉区2022-2023学年七年级下学期期中数学试题
7 . 如图,将
绕点
顺时针旋转
得到
,边
,
相交于点
,连接
.下列结论:①
;②
平分
;③
;④
.其中所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce74654b7088989396bb03fb619b0428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd94dd51562ecbee6edd4265326b765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5588b9238d940f09fd25191b930ce936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/817ccf96200350828be4a7a503a5ad02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/3e787b10-14f4-45be-b889-77c046a064f7.png?resizew=229)
您最近一年使用:0次
2022-12-09更新
|
130次组卷
|
4卷引用:专题3.6 图形的旋转(分层练习)(基础练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)
(已下线)专题3.6 图形的旋转(分层练习)(基础练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版) 福建省福州市长乐区2022-2023学年九年级上学期期中数学试卷福建省福州市第十五中学2023-2024学年九年级上学期月考数学试题(已下线)专题23.13 旋转(全章分层练习)(提升练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)
8 . 如图,点
在
内部,点
与点
关于
对称,点
与点
关于
对称.甲、乙两位同学各给出了自己的说法:甲:若
,则
是等边三角形;乙:若
,则
.对于两位同学的说法,下列判定正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6131160eaee962470abc7771df265c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc51601b6c84e2ffade0e91c9feaa970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c84a56823287fa2b878302cff66fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aefee236ce95b71927b9048409c5c68.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/6/f0e4b685-d0e5-4b79-a272-8a50359cdb32.jpg?resizew=146)
A.甲正确 | B.乙正确 | C.甲、乙都正确 | D.甲、乙都错误 |
您最近一年使用:0次
名校
9 . 三角形中,如果一个角是另一个角的3倍,这样的三角形我们称之为“灵动三角形”.例如,三个内角分别为120°、40°、20°的三角形是“灵动三角形”.如图,∠MON=60°,在射线OM上找一点A,过点A作AB⊥OM交ON于点B,以A为端点作射线AD,交线段OB于点C(我们规定0°<∠OAC<90°).下列结论正确的是_____ .(填入正确序号)
①∠ABO的度数为30°;
②△AOB不是“灵动三角形”;
③若∠BAC=70°,则△AOC是“灵动三角形”;
④当△ABC为“灵动三角形”时,∠OAC为30°或52.5°.
①∠ABO的度数为30°;
②△AOB不是“灵动三角形”;
③若∠BAC=70°,则△AOC是“灵动三角形”;
④当△ABC为“灵动三角形”时,∠OAC为30°或52.5°.
您最近一年使用:0次
2021-08-26更新
|
283次组卷
|
4卷引用:江苏省无锡市梁溪区侨谊实验中学2023-2024学年七年级下学期期中数学试题
解题方法
10 . 如图,在平行四边形ABCD,AD=2AB,F是AD的中点,作CE⊥AB,垂足E在线段AB上,连接EF、CF,则下列结论:①∠BCD=2∠DCF;②EF=CF;③S△CDF=S△CEF;④∠DFE=3∠AEF,-定成立的是_________ .(把所有正确结论的序号都填在横线上)
![](https://img.xkw.com/dksih/QBM/2020/7/19/2509503130812416/2509982380072961/STEM/b8824a0dcb044ca99877f0d0453aa6fc.png?resizew=171)
您最近一年使用:0次
2020-07-20更新
|
1128次组卷
|
6卷引用:18.1.1平行四边形的性质
(已下线)18.1.1平行四边形的性质山东省济南市章丘区2019-2020学年八年级下学期期末数学试题(已下线)18.1.1 平行四边形的性质-2020-2021学年八年级数学下册十分钟同步课堂专练(人教版)(已下线)专题5.8期末考前选做30题(填空题压轴版)-2020-2021学年八年级数学下学期期末专项复习(北师大版)(已下线)专题4.2 平行四边形及其性质(知识要点+专项练习)-2022-2023学年八年级数学下册同步精品课堂(浙教版)四川省达州市大竹县石河中学2022-2023学年八年级下学期期末数学试题