1 . 等腰三角形的一个角为
,则它的顶角为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36581140ebac5d28438ea63b1b23b65.png)
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2024-02-29更新
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65次组卷
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3卷引用:四川省凉山彝族自治州2023-2024学年八年级上学期期末数学试题
四川省凉山彝族自治州2023-2024学年八年级上学期期末数学试题江苏省南京市浦口区南京明道学校 2023-2024学年八年级上学期10月月考数学试题(已下线)北师大版七年级期末真题必刷常考60题(60个考点专练)-2023-2024学年七年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(北师大版)
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2 . 如图,等边
中,顶点
处各有一个动点
,它们同时出发,分别以相同速度由
向
和由
向
运动,经过
后,它们分别运动到了
,
处,连接
相交于点
.
吗?为什么?
(2)点
在运动过程中,
与
所成的
的大小有无变化?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a3e7d1f1890863b7483a98b618119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d744165d6aad705f64de41a9d931750a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/facb5a8d5add9856e65e1b46dd0116c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83e4f28c096dffd7df54b1162f5b3ae.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77282d5b97a60264cf15fb74b48e4b59.png)
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9卷引用:四川省达州市渠县第二中学2021-2022学年七年级下学期6月月考数学试题
四川省达州市渠县第二中学2021-2022学年七年级下学期6月月考数学试题江西省萍乡市安源区2019-2020学年七年级下学期5月线上教学评估数学试题山东省青岛市第三十九中学2019—2020学年七年级下学期期中数学试题京改版八年级数学上册 第十二章三角形单元测试鲁教版(五四制)数学七年级上册第一章 三角形单元检测山东省滨州市邹平市梁邹实验初级中学2023-2024学年八年级上学期10月月考数学试题山东省东营市2023-2024学年七年级上学期期末数学试题(已下线)专题5.8 简单的轴对称图形——等腰三角形(分层练习)-2023-2024学年七年级数学下册基础知识专项突破讲与练(北师大版)(已下线)暑假作业11 三角形和平行四边形中的最值问题和动点问题-【暑假分层作业】2024年八年级数学暑假培优练(北师大版)
3 . 如图,
在
边上,
,
,则
的度数为( )
![](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/f03a43549ab71f0998fffbcb48397b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1df9f0b80d85d8e6ac7b1cc052d054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/e813439a-36e0-4dca-acb5-c473009f2176.png?resizew=178)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 轮船在
处观测到灯塔
位于南偏东
方向上,轮船从
处沿南偏东
方向航行
至
处,在
处观测灯塔
位于北偏东
方向上.(按图上
代表实际距离
作图)
(1)根据题意作出图形,确定
、
、
的位置;
(2)根据作图,量出
、
两地之间的实际距离为
;
(3)求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a4c9b697e3df2b5469b71d3b5e47a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f971d44effe601c7244f7bcde43b863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3fb33e7fb8709bd8d5db686644d50b.png)
(1)根据题意作出图形,确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)根据作图,量出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fe30c67ac20cd4e8b9cc2d0d420a7b.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
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5 . 如图,在
中,
,点D、E、F分别在AB、BC、AC边上,且
,
.
是等腰三角形;
(2)当
时,求
的度数.
![](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/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee54b9b398ce80cd054b56173fe810f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
您最近一年使用:0次
2024-02-28更新
|
148次组卷
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4卷引用:四川省乐山市市中区2023-2024学年八年级上学期期末数学试题
四川省乐山市市中区2023-2024学年八年级上学期期末数学试题广东省茂名市高州市高州市第一中学附属实验中学2023-2024学年八年级下学期月考数学试题2024年湖南省初中学业水平考试数学模拟试卷(已下线)专题01+等腰三角形与直角三角形01(9大题型+优选提升题)-备战2023-2024学年八年级数学下学期期末真题分类汇编(北师大版)
6 . 如图,在
中,
,
,D为
上一点,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802a939a9ab14a1a762a4275c9ec6899.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/2677ee9264fd2b6338e4ed853c91e320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802a939a9ab14a1a762a4275c9ec6899.png)
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7 . 已知图中的两个三角形全等,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/2024/2/1/3423804115755008/3440990016962560/STEM/2f9ecb4077b940dd9350bbca8399285c.png?resizew=260)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://img.xkw.com/dksih/QBM/2024/2/1/3423804115755008/3440990016962560/STEM/2f9ecb4077b940dd9350bbca8399285c.png?resizew=260)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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8 . 如图,在
中,
,
的垂直平分线交
,
于点D,E,连接
,则下列结论错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024-02-26更新
|
38次组卷
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2卷引用:四川省成都市武侯区成都市玉林中学2023-2024学年八年级下学期期中数学试题
9 . 若
的三边长分别是a,b,c,则下列条件:①
;②
;③
;④
中不能判定
是直角三角形的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1ac3781e2ca56262e180134d9200bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcf6cb47d2204c18cdff0c08a3ee7ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e597138bc1ed3f80e3d4c5cc736584b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792fd4da4647ffd1ba0549012c5a2cd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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4卷引用: 四川省巴中市2023-2024学年八年级上学期期末考试数学试题(华师大版)
10 . 如图,点D是
边BC上一点,若
,
,
,则
的度数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa068df650aeef98d6335453d00632a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffc25223f469eefd32df10559212f0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8a896e05730e8dd3bee64a4911c33dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/070dd1ef-9615-4a27-bdb5-6798372d51db.png?resizew=160)
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