1 . 如图.在
中,
,
,
,
是
的中线,
是
上的动点,
是
边上的动点,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8b65efe27c217040c135d9e3111aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ad6519dff3fe2f49ddd9f656fe16d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce976810ed344b698856d12f78ff0cd8.png)
![](https://img.xkw.com/dksih/QBM/2019/11/27/2342967967498240/2343830991790080/STEM/4c0c68b3cbe44a6ea1b4ae739dac86b2.png?resizew=123)
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2 . 如图,在△ABC 中,已知AB=AC,AB的垂直平分线交AB于点N,交AC于点M,连接MB.若AB=8cm,△MBC的周长是14cm.若点P为直线 MN上一点,则△PBC周长的最小值是_______
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896311367729152/2951766749765632/STEM/d4b1fc33-706a-4f71-a7ae-65f83d684e54.png?resizew=135)
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3 . 如图在平面直角坐标系
中,
的位置如图所示.
(1)画出
关于
轴对称的
;
(2)在
轴上画出点
,使
最小:
(3)直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/fcf66b3d-2482-432a-9675-ae4387bdcf77.png?resizew=236)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51a8d10345f567e0f2daf18529d42f0.png)
(3)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
4 .
在平面直角坐标系中的位置如图所示.
、
、
三点在格点上.
![](https://img.xkw.com/dksih/QBM/2020/12/4/2606661954404352/2610191471345664/STEM/314644ec-8ff5-411a-9ac4-a3e1574d554b.png?resizew=292)
(1)作出
关于
轴对称的
,并写出点
的坐标________;
(2)在
轴上找点
,使得
最小,通过作图作出点
;
(3)直接写出点
的坐标为________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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://img.xkw.com/dksih/QBM/2020/12/4/2606661954404352/2610191471345664/STEM/314644ec-8ff5-411a-9ac4-a3e1574d554b.png?resizew=292)
(1)作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb026064f722ee4bfd7ffd84551306da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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2020-12-09更新
|
258次组卷
|
8卷引用:【校级联考】黑龙江省鸡东县2018-2019学年八年级上学期期末考试数学试题
【校级联考】黑龙江省鸡东县2018-2019学年八年级上学期期末考试数学试题黑龙江省哈尔滨市第三十五中学校2019-2020学年八年级上学期期中数学试题(已下线)黑龙江省哈尔滨市虹桥中学2020-2021学年八年级上学期11月月考数学试题黑龙江省哈尔滨市道里区虹桥初级中学校2020-2021学年八年级上学期12月月考数学试题黑龙江省哈尔滨市五常市2020-2021学年八年级上学期期末数学试题黑龙江省哈尔滨市南岗区第四十七中学2022-2023学年度八年级上学期9月月考数学(五四制)学情反馈试卷内蒙古奈曼旗教科体局义务教育联盟初中二区2019-2020学年八年级上学期期中数学试题2019年浙江省杭州市江干区实验中学中考数学三模试卷
5 . 如图,有一个圆柱,它的高等于12cm,底面半径等于3cm,在圆柱的底面点A有一只蚂蚁,它想吃到上底面上与点A相对的点B的食物,需要爬行的最短路程是(π取3)( )
![](https://img.xkw.com/dksih/QBM/2019/6/9/2222023378968576/2225162718101504/STEM/0e57c357741f42eeaede8ccec0d088ce.png?resizew=85)
![](https://img.xkw.com/dksih/QBM/2019/6/9/2222023378968576/2225162718101504/STEM/0e57c357741f42eeaede8ccec0d088ce.png?resizew=85)
A.10cm | B.12m | C.14cm | D.15cm |
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6 . 如图,正方形
的面积为24,
是等边三角形,点
在正方形
内,在对角线
上有一点
,使
的和最小,则这个最小值为 ( )
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750492536053760/2750789242249216/STEM/f1d14bb1d6d24fc0b8a463fe51048e22.png?resizew=125)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f3a30d63fde5623d018b4a77231967.png)
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750492536053760/2750789242249216/STEM/f1d14bb1d6d24fc0b8a463fe51048e22.png?resizew=125)
A.![]() | B.![]() | C.3 | D.![]() |
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2021-07-03更新
|
159次组卷
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2卷引用:黑龙江齐齐哈尔甘南县查哈阳农场初级中学2021-2022学年八年级下学期期中考试数学试题
22-23八年级下·江苏·开学考试
7 .
在平面直角坐标系中的位置如图所示.A、B、C三点在格点上.
(1)作出
关于
轴对称的
;并写出点
的坐标______;
(2)在
轴上找点
,使得
最小,直接写出点
的坐标______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/487b2021-3644-4423-b126-95dbae91d235.png?resizew=234)
(1)作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb026064f722ee4bfd7ffd84551306da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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2023-10-06更新
|
46次组卷
|
4卷引用:黑龙江省哈尔滨市松雷中学2023-2024学年八年级上学期月考数学试题
黑龙江省哈尔滨市松雷中学2023-2024学年八年级上学期月考数学试题黑龙江省哈尔滨市松南学校2023-2024学年八年级上学期月考数学试题(已下线)开学收心考试模拟卷01-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(苏科版)云南省昆明市呈贡区2023-2024学年八年级上学期期末数学试题
8 . 如图,在△ABC中,∠ABC=60°,BC=2,CD是△ABC的一条高线.若E,F分别是CD和BC上的动点,则BE+EF的最小值是_____ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/7acb1d8a-d1b9-4420-9773-9dd8267cb5b9.png?resizew=147)
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2018-12-13更新
|
364次组卷
|
5卷引用:2019年黑龙江龙东地区中考升学模拟大考卷(五)数学试题
9 . 如图,方格纸中每个小正方形的边长都是1,
的三个顶点都在格点上,如果用
表示
点的位置,用
表示
点的位置,那么:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/82a32f96-2ac4-4f98-9a7c-504d556768bb.png?resizew=291)
(1)画出平面直角坐标系;
(2)画出与
关于
轴对称的图形
(点
与点
对称,点
与点E对称,点
与点
对称);
(3)
为
轴上的一个动点,是否存在
使
的值最小?若存在请直接写出点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081cd41dab0f2a8f84b0e9f1df4843fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/82a32f96-2ac4-4f98-9a7c-504d556768bb.png?resizew=291)
(1)画出平面直角坐标系;
(2)画出与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/a0ed1ec316bc54c37c4286c208f55667.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13ec9a812274ad0839f20ba17348687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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10 . 如图,
中,A点坐标为
,B点坐标为
.C点坐标为
.
(1)在图中画出
关于y轴对称的
(不写画法),并写出点
,
,
的坐标.
(2)在y轴上找一点P,使
的长最短.在图中标出点P.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5511a368692de27c58ec48ce968de4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b7667904a57e4e882714b69b0dbb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631386549c0cec5981a1da47b05e5d25.png)
(1)在图中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(2)在y轴上找一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51a8d10345f567e0f2daf18529d42f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/ca7c55e2-41aa-4cd1-ac13-b6057eeb43fa.png?resizew=260)
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