已知
于点E,
于点F,且
过点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/0a055fbc-8cc1-4401-91f6-1dee0a35dafe.png?resizew=457)
(1)如图1,求证:
;
(2)点C是线段
延长线上一点,将
绕点O逆时针旋转
至
处,连接
.
①如图2,延长
交
于点G,求证:G为
的中点;
②如图3,当
时,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f05e1402579c480264a92f64d487764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8c79e38a2c0a29c602da3ba62ee6c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/0a055fbc-8cc1-4401-91f6-1dee0a35dafe.png?resizew=457)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70ef08c8c6dbcd1d236d6aa786eca7b.png)
(2)点C是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
①如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa2e7cd8020807f712774fc00b60cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703cb820b3aa9eaf2cd23a9bc6946704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
21-22八年级上·四川资阳·期末 查看更多[2]
四川省资阳市安岳县2021-2022学年八年级上学期期末数学试题(已下线)专题3.19 图形的平移与旋转(全章复习与巩固)(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(北师大版)
更新时间:2023-01-17 23:55:39
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图1,在平面直角坐标系中,点B的坐标是
,动点A从原点O出发,沿着x轴正方向移动,
是以
为斜边的等腰直角三角形(点A、B、P顺时针方向排列).
(此时点P与点C重合),则
______.当
时,点P的坐标是______;
(2)设动点A的坐标为
.
①点A在移动过程中,作
轴于M,
于N,求证:四边形
是正方形;
②用含t的代数式表示点P的坐标为:(______,______);
(3)在上述条件中,过点A作y轴的平行线交
的延长线于点Q,如图2,是否存在这样的点A,使得
的面积是
的面积的3倍?若存在,请求出A的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb49c1fd097c5aafc0c9080449f5fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
(2)设动点A的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88756f91267b7117d07e3f4b88e285b9.png)
①点A在移动过程中,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e19a722a1564ff4cecc6e1b5a6c59096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d1fa94fdc3ac213b3e628ca5fbd0ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b16c49d16305cf1afacc5a9e2bf7e9a.png)
②用含t的代数式表示点P的坐标为:(______,______);
(3)在上述条件中,过点A作y轴的平行线交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3111eb07acf36e3c08e8f72789ffd220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
您最近一年使用:0次
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|
适中
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名校
【推荐2】如图,在矩形
中,
是
上一点,
,
于点
.
;
(2)若
,
,求矩形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/c2e94399c4924cf2a862737a2825fe4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8689d619c2508c9000531fc1b8f1f21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5571596761ddaa4713b785b817c093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】学习了平行四边形后,小虹进行了拓展性研究.她发现,如果作平行四边形一条对角线的垂直平分线,那么这个平行四边形的一组对边截垂直平分线所得的线段被垂足平分.她的解决思路是通过证明对应线段所在的两个三角形全等得出结论.请根据她的思路完成以下作图与填空:
用直尺和圆规,作
的垂直平分线交
于点
,交
于点
,垂足为点
.
只保留作图痕迹![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
是平行四边形,
是对角线,
垂直平分
,垂足为点
.
求证:
.
证明:
四边形
是平行四边形,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d3a7c38ab21a2ad93426f87b3fb908.png)
①
___②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
垂直平分
,
____③
又
____④
___⑤![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
.
.
小虹再进一步研究发现,过平行四边形对角线
中点的直线与平行四边形一组对边相交形成的线段均有此特征.请你依照题意完成下面命题:
过平行四边形对角线中点的直线被一组对边截得的线段被对角线的中点___⑥
用直尺和圆规,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94190469ba2229faa6fdcc96841803da.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e76526b18b736232d9c273a07904dbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d3a7c38ab21a2ad93426f87b3fb908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c771d59d2be940a10a4c6887751043.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb6acdcab687e9e1c279f39d3d08f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5231d3a7c62f1c23541330177b786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544c2530493cb34682993aa532397b55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d2298d87c5466114fea4cc9ccfdcae.png)
小虹再进一步研究发现,过平行四边形对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
过平行四边形对角线中点的直线被一组对边截得的线段被对角线的中点___⑥
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐1】(1)问题发现:如图
,在
和
中,
,
,
,连接
,
交于点
,且
交
于点E
①
的值为______;
②
的度数为______;
(2)类比探究:如图
,在
和
中,
,
,连接
,交
的延长线于点
,且
交
于点
请计算
的值及
的度数;
(3)拓展延伸:如图
,在(2)的条件下,将
绕点
在平面内旋转,
,
所在直线交于点
,若
,
,请直接写出点
与点
重合时
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ed6bee57f4526320197d6a7474386f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50456e6fa59a67ef02a1580abe49abdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e294dfd5270b9984a39ea03e654c907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a68fdeb6a8e343977baa61db0606246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd1676e2d0de98a198870e3700159ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc55d95ab760ec04e2ded86e4ab8d958.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ed5e3d39698f7c4d8369ed8a76a09c.png)
(2)类比探究:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ed6bee57f4526320197d6a7474386f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50456e6fa59a67ef02a1580abe49abdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00141e9c9b57945396eaefd39b6f8d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23bbe2649800421a798e714b8fc3bdb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b3e716624ef05d5202f89aab1d07ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc55d95ab760ec04e2ded86e4ab8d958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ed5e3d39698f7c4d8369ed8a76a09c.png)
(3)拓展延伸:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50456e6fa59a67ef02a1580abe49abdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f7a982e1d88e912370a366fa67a765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dcb0603506617df576c4e1db604c1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/859d3472-d394-46c0-aeb2-4c913e392926.png?resizew=563)
您最近一年使用:0次
解答题-应用题
|
适中
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【推荐2】如图,是一个半圆形桥洞的截面示意图,圆心为O,直径
是河底藏线,弦
是水位线,
米,
于点E,此时测得
.
的长;
(2)如图,阴影矩形是漂浮的箱子移出水面的截面图,若其长
为10米,高
为2米,当点E恰在
中点时,
①画出半圆O最高点H,并直接写出点H到线段
的距离;
②若该箱子随水面上升1米,请判断此木箱能否通过该桥洞.并说明理由.
![](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/ec20a5dea07848d329052f60dfb48aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4a26b9ab8f36629aee288b6a0fc77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369003f6e739c9452b7a2154d25a0ed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图,阴影矩形是漂浮的箱子移出水面的截面图,若其长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
①画出半圆O最高点H,并直接写出点H到线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
②若该箱子随水面上升1米,请判断此木箱能否通过该桥洞.并说明理由.
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解答题-作图题
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【推荐1】如图,在长度均为1的正方形网格中建立如图所示的平面直角坐标系,已知A(1,0),B(4,2),C(2,4).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/2a46ecb1-a719-40d4-afc3-f16bfb6b259c.png?resizew=419)
(1)将△ABC沿着x轴向左平移5个单位后得到△
,请在图中画出平移后△
,则C的对应点
的坐标为____________.
(2)线段
可以看成是线段BA绕着某个定点旋转180°后得到的图形,这个定点的坐标是_____.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/2a46ecb1-a719-40d4-afc3-f16bfb6b259c.png?resizew=419)
(1)将△ABC沿着x轴向左平移5个单位后得到△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1264a2e3609e1c274acb89b5ea5019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1264a2e3609e1c274acb89b5ea5019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
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【推荐2】如图,在Rt△ABC中,∠BAC=90°,AB=AC,点D是△ABC内一点,连结AD,将线段AD绕点A逆时针旋转一定角度得到线段AE使∠BAD=∠CAE(E在AC右侧),连结BD,CE.
![](https://img.xkw.com/dksih/QBM/2016/1/29/1573966774558720/1573966780276736/STEM/312312929dd3422aa34bea9dfeb39757.png)
(1)求证:BD=CE;
(2)若AD=2,求点D绕点A旋转到点E所经过的路径长.
![](https://img.xkw.com/dksih/QBM/2016/1/29/1573966774558720/1573966780276736/STEM/312312929dd3422aa34bea9dfeb39757.png)
(1)求证:BD=CE;
(2)若AD=2,求点D绕点A旋转到点E所经过的路径长.
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