1 . 如图,四边形
中,
为对角线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/4ed8b42a-fbb3-46ff-a138-89a605a7d822.jpg?resizew=210)
(1)尺规作图:作
的垂直平分线分别交
于点E、F、G.连接
(不写作法和结论,保留作图痕迹);
(2)求证:四边形
是菱形(请补全下面的证明过程).(请仔细读题,按要求填空)
证明:
①_____________,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
垂直平分
,
②_____________,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3692bbfc922a9a081bbfeb04aebf5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
,
③_____________,
即
,
四边形
是平行四边形,
④_____________,
平行四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7e578b029e2e744005c897ba8e3711.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/4ed8b42a-fbb3-46ff-a138-89a605a7d822.jpg?resizew=210)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbb97843d710c1f8c838e6c9364734c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5941f1e0c02627e2c82b03014d685d.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c29b1a510e912c0a6e33359e2c9be2e.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8a78aa8b9f91264e297864c5dd88ee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3692bbfc922a9a081bbfeb04aebf5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3845ee65b844185c42ebb3b6151a1536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
即
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0ce27615645c85eaf23cbbe3116a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c29b1a510e912c0a6e33359e2c9be2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c29b1a510e912c0a6e33359e2c9be2e.png)
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名校
2 . 如图,在
中,D为
中点,E为
上一点,连接
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/e4c72b64-694c-4adb-b314-81418da1a04f.png?resizew=240)
(1)过点B作
角平分线,交
于点F,连接
(只保留作图痕迹);
(2)求证:
,请根据下面内容填空.
证明:
∵
平分
,
∴_______________________,
∵在
和
中,
,
∴
,
∴_______________________,
又∵D为
的中点,
∴_______________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b02bbd279ada752310d27d729e6ac55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/e4c72b64-694c-4adb-b314-81418da1a04f.png?resizew=240)
(1)过点B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceae8901cc958801021d26f63cc3e84.png)
证明:
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
∴_______________________,
∵在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9966839944bf4087bd18fede1d2d2c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c02d551dfd4f2b92c0df88570eec01.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e73f79ac90582309ad3ab0fde995f1b.png)
∴_______________________,
又∵D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
∴_______________________
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2卷引用:重庆市万州区万州二中实验中学2022-2023学年九年级上学期12月月考数学试题
3 . 如图,
,点D在BC边上,
,EC、ED与AB交于点F、G,则下列结论不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/6755743b-85b8-4046-a508-7203ece5e491.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5aa716097ddf61853c97d161ca6c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5197b4b5cb10b8082a4f72d8210207fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/6755743b-85b8-4046-a508-7203ece5e491.png?resizew=139)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
4 . 如图,在
中,
,顶点A的坐标为
,P是
上一动点,将点P绕点
逆时针旋转
,若点P的对应点
恰好落在
边上,则点
的坐标为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2385884978fefcfd46ec027d0822e472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77cb0a28d72b7e7eacc877e97bc7ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
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重庆市万州区2021-2022学年九年级上学期期末数学试题(已下线)专题3.27 图形的平移与旋转(动点问题)(基础篇)(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) 江苏省泰州市姜堰区四校联考2022-2023学年八年级下学期第一次月考数学试卷 四川省泸州市龙马潭区2023-2024学年九年级上学期期末数学试题2024年辽宁省大连市第三十四中学中考一模数学试题
5 . 如图1,在
中,
,
,将
边绕着点A逆时针旋转
,得到线段
,连接
交
边于点E,过点C作
于点F,延长
交
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/732aa282-a5df-402b-b9df-214d202c1d6f.png?resizew=635)
(1)求证:
;
(2)如图2,当
时,求证:
;
(3)如图3,当
时,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb1aa7bc4a01962fc1297f17fa9128f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac18b0388014ae20b2add2975ef56aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/732aa282-a5df-402b-b9df-214d202c1d6f.png?resizew=635)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d9089fd99ca95e6850f58306d3727b.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a36a107ab01979e10e331b6131afee.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c69a23d106fd34aa17b22e9c9a8de36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b2b9953d6ba4d1dbb13dedbaf209374.png)
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6 . 如图,在
中,D是边
的中点,过点B作
交
的延长线于点E,点N是线段
上一点,连接
交
于点M,且
.
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896398164705280/2898535925178368/STEM/b1c1c4bd-c871-41e9-b574-e36020b25368.png?resizew=248)
(1)若
,
,求
的度数;
(2)求证:
.
![](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/83b5d737d39e5ea753c6c824dd964751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a26cd396cc0c512f544d37c00018749.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896398164705280/2898535925178368/STEM/b1c1c4bd-c871-41e9-b574-e36020b25368.png?resizew=248)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17417384653d460f18c4c4a52a0a6354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d57d36b474e1a24c90489254d5516f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d16fab0f52c8af5abba0bf19a06ea0.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4a047714a74806403416ba8c0a2d02.png)
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7 .
和
按如图所示的位置摆放,顶点B、C、D在同一直线上,
,
,
.将
沿着
翻折,得到
,将
沿着
翻折,得
,点B、D的对应点
、
与点C恰好在同一直线上,若
,
,则
的长度为( ).
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896398164705280/2898535924867072/STEM/4baf4a3c-c667-4c14-88b8-1c70184c1f96.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2598f844644c4245eb226ecca57ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0105d0889f6fa9cb5430cf9e09337173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2da1d50433aecf541991fd0f01773cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494c143800557fdcb2a7dc7c87fbb0a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2598f844644c4245eb226ecca57ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbdd9ed5bd34796daaa11d75ab946da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6f3d14d4c0d628472a0b5dbd603f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ed09ecf106302624e0ab7bad3a1867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd46c836f4108d26b7ac0b45cc872816.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896398164705280/2898535924867072/STEM/4baf4a3c-c667-4c14-88b8-1c70184c1f96.png?resizew=157)
A.7 | B.6 | C.5 | D.4 |
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5卷引用:重庆市万州区2021-2022学年八年级上学期期末数学试题
重庆市万州区2021-2022学年八年级上学期期末数学试题(已下线)3.3 (附加2) 利用勾股定理解决折叠、展开等问题(练习)-2022-2023学年八年级数学上册同步精品课堂(苏科版)(已下线)17.2 勾股定理的折叠问题(第3课时)(练习)-2022-2023学年八年级数学下册同步精品课堂(人教版)(已下线)第1章 勾股定理(单元测试·培优卷)-2023-2024学年八年级数学上册基础知识专项突破讲与练(北师大版)(已下线)第3章 勾股定理(单元测试·培优卷)-2023-2024学年八年级数学上册基础知识专项突破讲与练(苏科版)