1 . 如图,点
,
在线段
上,
,
于点
,
于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/0a349257-4870-4cba-bd30-eb0358439b91.png?resizew=208)
(1)求证:
;
(2)若
,试判断
的形状并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e6363330b33ca9feda927e6ffd3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e2c2b4ecbbd7084dc5327d74cd6740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324aae9536a57bcaf320795715f20b75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c244edbf77fbb8e9c017515e370c5c8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/0a349257-4870-4cba-bd30-eb0358439b91.png?resizew=208)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c10ef52c84726a0a1e9a11c660f921.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bce074d029fd48029eb7275dda15fe8.png)
您最近一年使用:0次
2022九年级上·全国·专题练习
2 . 如图,
是
的直径,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/d0e45444-6ca9-4886-86a6-c0dea3815e34.png?resizew=130)
求证:
(1)
;
(2)
是等边三角形;
(3)
.
![](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/7de966c316db1013defc56372fcf814e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8052651082b1215593dafbf10e72b837.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/d0e45444-6ca9-4886-86a6-c0dea3815e34.png?resizew=130)
求证:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75582a86b2b09db7221f22c7fcb35362.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccac9fe057122d775256a56577abd46f.png)
您最近一年使用:0次
3 . 如图1,
中,
,
于点
,
平分
,
,
与
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/e3ab0a52-9be6-4ac7-bad5-6a4f13d515f0.png?resizew=483)
(1)求
的长;
(2)延长
与
相交于一点
,如图2,求证:
是等边三角形;
(3)如图3,点
是
中点,点
是
上一动点,连接
,
.当
时,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93380ab8eccc6e6f11bdf19ffc2d4cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](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/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/e3ab0a52-9be6-4ac7-bad5-6a4f13d515f0.png?resizew=483)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
(3)如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1719410d21e3de1242366ce2965e838c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
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2023-03-11更新
|
140次组卷
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3卷引用:云南省楚雄彝族自治州南华县2022-2023学年八年级上学期期末数学试题
云南省楚雄彝族自治州南华县2022-2023学年八年级上学期期末数学试题贵州省贵阳市南明区第一实验中学2022-2023学年八年级下学期3月月考数学试题(已下线)专题7.36 平面图形的认识(二)中的动点问题(分层练习)(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)
4 . 在
中,
,
,
、
两点在直线
上(点
在点
的左侧).若
,
,求证:
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3df3384f0f55b67ee9cf42f75e34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/4b9feeff-9677-4491-8820-70a5f55e4cb0.png?resizew=233)
您最近一年使用:0次
2023-02-17更新
|
215次组卷
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2卷引用:湖北省孝感市孝南区2022-2023学年八年级上学期期末学业水平监测数学试卷
5 . 如图,已知
是等边三角形,D是
延长线上一点,
平分
,且
.
求证:
(1)
;
(2)
为等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa80cfd38f59e5cbbb30628d03113689.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/35161f13-012b-40cc-b0bc-d5e95df476e3.png?resizew=153)
求证:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
您最近一年使用:0次
2022-11-23更新
|
255次组卷
|
4卷引用:天津市武清区2022~2023学年八年级上学期期中数学试卷
6 . 如图,在
中,
,
,点D是
的中点,连接
,
,求证:
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf7bbcc6deed520368b89c90502dab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71622531dfa894f21b2da123d020d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/8639a6ea-ca0c-40d2-800d-a527ce5cb224.png?resizew=151)
您最近一年使用:0次
2022-11-22更新
|
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3卷引用:新疆维吾尔自治区阿勒泰地区哈巴河县白桦中学2022-2023学年八年级上学期期中数学试题
名校
7 . 如图,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/27fcfc62-b3ca-48e0-a565-d2d89a978234.png?resizew=171)
(1)求证:
;
(2)若
,求证:
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8abfdaab699cfe51bb9678110ad6aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571ffae2f77df57a8e121fdb1ec02bb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/27fcfc62-b3ca-48e0-a565-d2d89a978234.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
您最近一年使用:0次
8 . 如图,
和
都是等边三角形,点
在
上,点
在
上,
,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/ca48061c-a051-4ae1-ba0a-25631ff00602.png?resizew=157)
(1)求证:
.
(2)判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1db2c0955e5a5be47faf855bca738a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/ca48061c-a051-4ae1-ba0a-25631ff00602.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd62b004acf6e16131548aecdb50a18.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
您最近一年使用:0次
2023-01-30更新
|
168次组卷
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2卷引用:湖南省郴州市汝城县四校2022-2023学年八年级上学期期末统一考试数学试题
9 . 如图,已知
,
,
,
.
为等边三角形;
(2)求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287d5c480994c8d47835cff34d84025c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0188b06b514e41f298449ede057e2062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9817d6eaf6f9454152b2891f33aaa760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
您最近一年使用:0次
2023-01-26更新
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327次组卷
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7卷引用:云南省昭通市昭阳区第一中学2021-2022学年八年级上学期期末数学试题
云南省昭通市昭阳区第一中学2021-2022学年八年级上学期期末数学试题山东省济南市长清区华曜实验学校2022-2023学年八年级上学期期末数学试题(已下线)专题06 等边三角形(五大类型)-2023-2024学年八年级数学上册《知识解读·题型专练》(苏科版)(已下线)专题04 等边三角形(六大类型)-2023-2024学年八年级数学上册《知识解读·题型专练》(人教版)(已下线)专题强化训练01 等腰(边)三角形的判定与性质(30题)-【帮课堂】2023-2024学年八年级数学上册同步学与练(人教版)(已下线)第02讲 等边三角形(知识解读+达标检测)-2023-2024学年八年级数学下册《知识解读·题型专练》(北师大版)(已下线)第05讲 等边三角形的性质和应用(知识解读+达标检测)-2023-2024学年七年级数学下册《知识解读·题型专练》(北师大版)
10 . 如图,
为
的直径,弦
于点E,连接
并延长交
于点F,连接
,
.
![](https://img.xkw.com/dksih/QBM/2022/11/3/3101543930396672/3101801585262592/STEM/5d84c70e0f9c4c8da9a4c27276123a24.png?resizew=143)
(1)求证:
;
(2)连接
,若
,求
的长.
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4d997e2f22397b870401ccc397a5a9.png)
![](https://img.xkw.com/dksih/QBM/2022/11/3/3101543930396672/3101801585262592/STEM/5d84c70e0f9c4c8da9a4c27276123a24.png?resizew=143)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1228ebf9a05c67644357de374bb2f2.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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2022-11-03更新
|
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2卷引用:北京市燕山地区2022-2023学年九年级上学期期中质量检测数学试题