1 . 如图,平面直角坐标系内,小正方形网格的边长为1个单位长度,
的三个顶点的坐标分别为
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462545089888256/2463276028198913/STEM/86eea759-dc06-49da-bd05-12512d7253c9.png?resizew=410)
(1)将
向上平移1个单位长度,再向右平移5个单位长度后得到的
;直接写出
的坐标;
(2)将
绕原点
顺时针方向旋转
得到
直接写出
的坐标;
(3)在
轴上存在一点
,满足点
到
与点
距离之和最小,请直接写出
点的坐标(学生可以在练习本上画图,答题卡上直接写出答案即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c80eabaf101288433b3b9e92a4805a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee07d86765c4fb74ac647742f16bd57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddf140d78ed70107444987a1c0fa8bf5.png)
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462545089888256/2463276028198913/STEM/86eea759-dc06-49da-bd05-12512d7253c9.png?resizew=410)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83faf535663e6882c11483e8b761273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
(3)在
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2 . 如图,有一圆柱体,它的高为20cm,底面半径为7cm.在圆柱的下底面A处有一个蜘蛛,它想吃到上底面上与A点相对的B点处的苍蝇,需要爬行的最短路径是__________ cm.(结果用带根号和π的式子表示)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/112d1434-b101-452f-880c-16c4a11dcab7.png?resizew=77)
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名校
3 . 按要求完成作图:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/8ce1921a-cad0-4acd-9549-cdd72e6a2f1f.png?resizew=332)
(1)作出△ABC关于y轴对称的△AB1C1;
(2)在x轴上找出点P,使PA+PB最小,并写出P点的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/8ce1921a-cad0-4acd-9549-cdd72e6a2f1f.png?resizew=332)
(1)作出△ABC关于y轴对称的△AB1C1;
(2)在x轴上找出点P,使PA+PB最小,并写出P点的坐标.
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2017-05-11更新
|
189次组卷
|
2卷引用:2016-2017学年黑龙江省哈尔滨市旭东中学校八年级上学期期中考试数学试卷
4 . 在平面直角坐标系
中,抛物线
与x轴交于
,
两点,与y轴交于点C, P为x轴下方抛物线上一点(点P不在y轴上).
(2)如图①,当点P的纵坐标为
时,D为直线
上一点,
的周长为9是否成立?若成立,请求出点D的坐标;若不成立,请说明理由;
(3)若直线
与y轴交于点M,直线
与抛物线交于点Q,连接
与y轴交于点H,如图②,试求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b286a72a818ccc52e63581841da08dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8950c7bc835103d52ceffab14b6b31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dabd5b4958bfced7a26f97e88579865.png)
(2)如图①,当点P的纵坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7189182cc23d759be2764d141952737b.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e109a9e42361f1dd54861a741b97f196.png)
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5 . 如图,抛物线y=
x2+bx+c与x轴交于A,B两点,点A的坐标为(﹣1,0),与y轴交于点C(0,﹣2).
(1)求抛物线的解析式及顶点D的坐标;
(2)点M(m,0)是x轴上的一个动点,当MC+MD的值最小时,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求抛物线的解析式及顶点D的坐标;
(2)点M(m,0)是x轴上的一个动点,当MC+MD的值最小时,求m的值.
![](https://img.xkw.com/dksih/QBM/2017/6/29/1719197970587648/1720271830450176/STEM/b651467ba00843f5aa04e753e0e7b637.png?resizew=137)
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6 . 如图,方格纸中每个小正方形的边长均为1,
为对角线,线段
的端点A、B在小正方形的顶点上.
的同侧画一个以
为腰的等腰直角三角形
,点E在小正方形的顶点上;
(2)点P在图中线段
上,连接
,当
的值最小时,画出点P,并求出
的最小值.(保留作图痕迹)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)点P在图中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4125573ed28dd7dd74452ba3cd96f3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb41f8ded9116e83f87a8e43b0ce7f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb41f8ded9116e83f87a8e43b0ce7f8.png)
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