1 . 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)
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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
2 . 在
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/fb4699d3-9d92-4bbc-8bc0-49ae72f33aeb.png?resizew=176)
(1)求作线段
的垂直平分线
,与线段
相交于点
,与线段
相交于点
.(不写作法,保留作图痕迹);
(2)在你所作的图形中,连接
. 求证:
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/fb4699d3-9d92-4bbc-8bc0-49ae72f33aeb.png?resizew=176)
(1)求作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)在你所作的图形中,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
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名校
3 . 如图,
是等边三角形,点
、
、
分别在
、
、
上;若
,
,求证:
![](https://img.xkw.com/dksih/QBM/2022/11/17/3111644669534208/3113773345742848/STEM/ddd08d9f19424deb8eb1a4f39426e79b.png?resizew=127)
(1)
;
(2)
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/a0ed1ec316bc54c37c4286c208f55667.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://img.xkw.com/dksih/QBM/2022/11/17/3111644669534208/3113773345742848/STEM/ddd08d9f19424deb8eb1a4f39426e79b.png?resizew=127)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ad431480c898759d4d73e4f29c92e3.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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名校
4 . 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)
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5 . 如图,
,
相交于点
,
.
![](https://img.xkw.com/dksih/QBM/2022/11/12/3107835390451712/3111467050876928/STEM/b27b31a14d4d4d5898114209d67ac180.png?resizew=128)
(1)作
的角平分线
,交
于点
(要求:尺规作图,保留作图痕迹,不写作法);
(2)若
,则
的形状是______.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0aa4c793921fdaa5d430cb90d78ca6.png)
![](https://img.xkw.com/dksih/QBM/2022/11/12/3107835390451712/3111467050876928/STEM/b27b31a14d4d4d5898114209d67ac180.png?resizew=128)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4d00b86b2f067b902baf6e52f0faab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f239a35de1828b14a58be5bd5af9e8.png)
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名校
6 . 下列四个命题:①同位角相等,两直线平行;②等边三角形的三个内角都相等;③全等三角形的对应角相等;④如果
,那么
. 它们的逆命题是真命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5821f59d12217af9a3804379c8231f.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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2022-11-12更新
|
168次组卷
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5卷引用:福建省泉州市培元中学2022-2023学年八年级上学期期中考试数学试题
福建省泉州市培元中学2022-2023学年八年级上学期期中考试数学试题河南省洛阳市伊川县2022-2023学年八年级上学期期末数学试题(已下线)(重庆新中考题型模式10+8+8)黄金卷05-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(重庆专用)(已下线)第04讲 定义、命题与证明-【暑假自学课】2023年新八年级数学暑假精品课(浙教版)(已下线)专题02 定义与命题(四大类型)(题型专练)-2023-2024学年八年级数学上册《知识解读·题型专练》(浙教版)
7 . 下列命题正确的是( )
A.等腰三角形的角平分线、中线、高线互相重合 |
B.三角形三条中线的交点叫做三角形的重心 |
C.两边及其中一边的对角对应相等的两个三角形全等 |
D.有一个内角是![]() |
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8 . 若
的三边分别是a,b,c,则下列条件能判断
是直角三角形的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2022-11-05更新
|
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6卷引用:山东省青岛市城阳区2022-2023学年八年级上学期期中数学试题
9 . 如图,点
在线段
上,
,
,求证:
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c61e530dbeb952dc8e210ae1d9a5c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/60443fde-e972-4b28-97ac-7d97791a8061.png?resizew=205)
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2卷引用:辽宁省鞍山市铁东区2022-2023学年八年级上学期期中数学试题
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