1 . 下列说法:①在三角形中,
角所对的边等于最长边的一半;②与一条线段两个端点距离相等的点,在这条线段的垂直平分线上;③等腰三角形的角平分线、中线、高线三线合一;④有一个内角是
的等腰三角形是等边三角形;⑤三个外角都相等的三角形是等边三角形.其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2 . 已知:
是
的高,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/64610492-d0fb-4daa-9ad7-69902c50f480.jpg?resizew=552)
(1)如图1,求证:
;
(2)如图2,点
为
边上一点,线段
的垂直平分线交线段
于点
,点
在线段
上,连接
,且
,求证:
;
(3)如图3,在(2)的条件下,作
交线段
于点
,
于点
,连接
,若
的面积为6,且
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba77f66ecad8eb4a7a63f169f28a3b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/64610492-d0fb-4daa-9ad7-69902c50f480.jpg?resizew=552)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc10b9cbf3d3a4c7e43deab6a5c13b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374e2198b495b86b0f8308d28035a3db.png)
(3)如图3,在(2)的条件下,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/181dcfb5e97b5f0a9347278c5afd2149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae000b6fa894db8c56292067b90b4c74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d493b4c84d8dc832e323a0bcd0db5589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05529d5906c6873231d138127bc9e2d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
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3 . 下列说法中正确的个数为( )
①三角形三边垂直平分线的交点到三边的距离相等;
②如果三角形一边上的中线等于这边的一半,那么这个三角形是直角三角形;
③如果三角形的一个外角的平分线平行于三角形的一边,那么这个三角形是等腰三角形;
④若
,则分式
的值为0.75.
①三角形三边垂直平分线的交点到三边的距离相等;
②如果三角形一边上的中线等于这边的一半,那么这个三角形是直角三角形;
③如果三角形的一个外角的平分线平行于三角形的一边,那么这个三角形是等腰三角形;
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339d89981e2c913e19e9fd419ddcecc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680ed497f982ce243163a4b77980d0d7.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
4 . 如图,已知
,
,
边的垂直平分线交
,
于点
、
若
的周长为
,则
的周长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e7170bb4a2ddcef39391a06c989162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/e289da68-5590-4638-918f-f45ae28334ba.png?resizew=163)
您最近一年使用:0次
5 . 如图,在
中,
,D是
的中点,
,
,若
,
,下列说法:①四边形
是平行四边形;②
是等腰三角形;③四边形
的周长是
;④四边形
的面积是
.正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/47451bc3-baf5-474e-85f4-be9a6fa0e8fb.png?resizew=205)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82da6815bc213dfd78c2f77cd7ded8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6402a3bb6be38f5bfafacc86c7bd008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b772f3670080e6146b56d2b5673efec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3d814a5e87bf9969c779c306a27a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e5bf9b0f3aed783accacacfd87cec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778f6f1b4e753c19ed472d81044ad180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32d0895d842160a706ce95613f41fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e0607748eb4205761559567a31043e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32d0895d842160a706ce95613f41fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78c013cb4fc61193b651072d5e15de4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/47451bc3-baf5-474e-85f4-be9a6fa0e8fb.png?resizew=205)
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次
名校
6 . 如图,
中,
是
边的垂直平分线,垂足为
,交边
于点
,连接
,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/c65bc0ae-9ce8-4d72-8f1f-8b251d470c12.png?resizew=223)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46053b4f3e09746b3ac4c9205c9f3379.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/c65bc0ae-9ce8-4d72-8f1f-8b251d470c12.png?resizew=223)
A.16 | B.15 | C.13 | D.14 |
您最近一年使用:0次
2024-01-01更新
|
113次组卷
|
2卷引用:黑龙江省哈尔滨市萧红中学2023-2024学年八年级上学期月考数学试题
7 . 如图,在等腰三角形
中,
,分别以点
、
为圆心,大于
长为半径画弧,两弧分别相交于点
和点
,连接
,直线
与
交于点
,连接
,则
的度数是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ecf8229fa5ff4e2dc3bba01453c6b9.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/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/1661d858-0062-4d42-a126-5720f231c17f.png?resizew=159)
您最近一年使用:0次
8 . [问题提出]
如图1,在
中,
,
是
的中线,
是线段
上的一个动点,且点
不与点
,
重合,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/18c0b400-7ad9-4994-854c-79b9c5bc4d8c.png?resizew=461)
(1)求证:
.
[问题探究]
将线段
绕点
逆时针旋转,使点
的对应点
落在直线
上,令
,
.
(2)如图2,当
时,
①当点
在线段
上的位置发生变化时,
的大小是否发生变化?请说明理由;
②探究
与
之间的数量关系,并说明理由.
[迁移探究]
(3)如图3,当
,且
时,试探究
与
之间的数量关系,并说明理由.
如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/18c0b400-7ad9-4994-854c-79b9c5bc4d8c.png?resizew=461)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
[问题探究]
将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c421ab2dc57f44899efb36549781347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b290efb9f94c6d30cffb5973a78d9ec.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a23d521606a35298bbf147f7f830c.png)
②探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
[迁移探究]
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
9 . 如图,
中边
的垂直平分线分别交
、
于点
、
,
,
的周长为
,则
的周长是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/f52a58fbaf4fea03567e88a9f0f6e37e.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/3a5d992ef98236bad9728cf0d23644a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce710269ec0786472cad1bb73ee7d3ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/d8194915-b052-4fc6-b62a-5898a3e725a1.png?resizew=154)
您最近一年使用:0次
2023-12-29更新
|
46次组卷
|
2卷引用:黑龙江省齐齐哈尔市龙江县区部分学校联考2023-2024学年八年级上学期期末数学试题
名校
10 . 如图,在
中,
分别垂直平分
和
,交
于
两点,
与
相交于点
.
,则
的度数为 ;
(2)若
,则
的度数为 ;(用含
的代数式表示)
(3)连接
,
的周长为
,
的周长为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4fa2c4bd682b3fc8667728ba8f2f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f8eff113ca3f0d0200253c7c2f5a7a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67730019eec7bb987f2d2d1d36566de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07505530a9ec2f9c8a23e3c9eafa313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2105973a06b89a2be3939eff0da03e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd6f4250ca6b1b9bce234a01f00d44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaceb8d6c6927e14d9ac7a557a2b11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d59c6d9b504860487d7240ef603f1c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
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2023-12-29更新
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