如图1,在矩形
中,
的平分线交对角线
于点M,交
于点N,
,
,垂足分别为E、F.
是正方形;
(2)如图2,过点C作
,若
,
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9301ad0164a3b7cadacb775435a811c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1097a13c0408e0709fca27c0f1f5bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f11969bbf853d6a703eac037566f3e5.png)
(2)如图2,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54cfa1de0e043d507792e97bcb08c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbcf5c78ba1acaefcb13c4f06d4d3e6c.png)
22-23八年级下·江苏常州·期中 查看更多[4]
江苏省常州市溧阳市2022-2023学年八年级下学期期中数学试题(已下线)第08讲 正方形(3大考点+6种题型+强化训练)-【帮课堂】2023-2024学年八年级数学下册同步学与练(苏科版)(已下线)专题02 矩形菱形正方形及中位线(六大题型)-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(苏科版)(已下线)第9章 中心对称图形-平行四边形 全章高频考点专练(4种专练+10个题型+3种思想)原卷版
更新时间:2023-05-10 11:26:34
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知
是
的角平分线,点E,F分别在边
,
上,
,
,
与
的面积之和为S.
,
,
时,
①如图①,若
,
,则
________,
________;
②如图②,若
,
,则
________,
________;
(2)如图③,当
时,探究S与m,n的数量关系,并说明理由.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3be96420ac78c8621fcb47a45514fa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63fa985f668796640ee33c05f1110cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
①如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee0db46c9bb69fe89869cf429c730c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
②如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1caa073449cb946ae45b58f70d47b0b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
(2)如图③,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66b90ffe8c9a93aba917c61007e895.png)
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名校
【推荐2】如图,在
中,
,
,
,
,
,动点E以
的速度从A点向F点运动,动点G以
的速度从C点向A点运动,当一个点到达终点时,另一个点随之停止运动,设运动时间为t.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/351bb75d-755f-4c6b-ad56-9cae47da2256.png?resizew=164)
(1)求证:
;
(2)当t取何值时,
与
全等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cade3f0bf51a577876dc2e345fbf33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa30a9ee227af2b387cf6e028c20d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba870ac7e456d8daa098c9d52aeccc2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977a60db80f56f580990fe410f1b4a39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3472b5a51bb9bc0e0dbd919b371049dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240ecdd3d8ef73e6a7c3b9bc6b03409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbbd11ff5f019de35a4f836a547c3db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/351bb75d-755f-4c6b-ad56-9cae47da2256.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7c2806bd0276701868efb3ef6f170e.png)
(2)当t取何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fd09f591e95fd40e8ecfe6020f9f46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f25763d71f6e34bc5591078eafde295.png)
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【推荐1】如图,
中,
,
,
.将
沿
方向向右平移得到
.若阴影部分平行四边形
的面积为8,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/01dcfe99-b21f-49a0-9d6f-4ab9a8461e33.png?resizew=212)
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【推荐2】如图,在菱形ABCD中,对角线AC、BD相交于点O,过点D作对角线BD的垂线交BA的延长线于点E.
(1)证明:四边形ACDE是平行四边形;
(2)若AC=8,BD=6,求平行四边形ACDE的面积.
(1)证明:四边形ACDE是平行四边形;
(2)若AC=8,BD=6,求平行四边形ACDE的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/ee7157a2-a590-448e-b357-38e73b0d31b5.png?resizew=245)
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【推荐1】【教材呈现】如图是华师版九年级上册数学教材第103-104页的部分内容.
【定理证明】(1)小明根据教材图2的提示,证明过程为:延长
至点
,使
,连接
、
…,结合图①帮助小明完成直角三角形的性质:“直角三角形斜边上的中线等于斜边的一半”的证明.
【定理应用】(2)如图②,在
中,
,垂足为点
,
是
边的中线,
垂直平分
,则
,则
为________度.
【拓展提高】(3)如图③,在
中,
,
,
恰好是中线,则
的度数为________度.
如图1,画![]() ![]() ![]() ![]() ![]() ![]() ![]() 已知:如图2,在 ![]() ![]() ![]() 求证: ![]() ![]() |
![](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/d0fa1aa5a7a5bb172ed4603f17c8b2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
【定理应用】(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a98f404d1abc3c8b53a93681b2f1636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
【拓展提高】(3)如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22b02f6c8636152aeb62d191251e931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/7cf856e9-ac47-4041-9dd2-2bb0ed051e3e.jpg?resizew=308)
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【推荐2】如图,已知在△OAB中AO=BO,分别延长AO,BO到点C、D,使得OC=AO,OD=BO,连接AD,DC,CB.
(1)求证:四边形ABCD是矩形;
(2)以AO,BO为一组邻边作平行四边形AOBE,连接CE.若CE⊥AE,求∠AOB的度数.
(1)求证:四边形ABCD是矩形;
(2)以AO,BO为一组邻边作平行四边形AOBE,连接CE.若CE⊥AE,求∠AOB的度数.
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729286882779136/2769658493829120/STEM/f9e17c7e-0145-4328-aef2-25029c2c81f8.png)
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【推荐1】如图,AB是⊙O的直径,且AB=6,过点B作⊙O的切线BM,以点M为圆心,BM的长为半径画弧,交⊙O于点C(不与B点重合),连接AC并延长,交BM的延长线于点D.
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931333121810432/2946673810202624/STEM/6dc1aa0b816645ae9a6c3e62e547ceee.png?resizew=158)
(1)求证:MC是⊙O的切线.
(2)填空:①当MC= 时,四边形BOCM是正方形;
②当MC= 时,三角形CDM是等边三角形.
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931333121810432/2946673810202624/STEM/6dc1aa0b816645ae9a6c3e62e547ceee.png?resizew=158)
(1)求证:MC是⊙O的切线.
(2)填空:①当MC= 时,四边形BOCM是正方形;
②当MC= 时,三角形CDM是等边三角形.
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【推荐2】如图,在△ABC中,AB=AC,P是边BC的中点,PD⊥AB,PE⊥AC,垂足分别为D、E
![](https://img.xkw.com/dksih/QBM/2019/11/15/2334415386443776/2337217732739072/STEM/e8062eb8e2f34b31a2580f52219a77e5.png?resizew=157)
(1)求证:PD=PE;
(2)DE与BC平行吗?请说明理由;
(3)请添加一个条件,使四边形ADPE为正方形,并加以证明.
![](https://img.xkw.com/dksih/QBM/2019/11/15/2334415386443776/2337217732739072/STEM/e8062eb8e2f34b31a2580f52219a77e5.png?resizew=157)
(1)求证:PD=PE;
(2)DE与BC平行吗?请说明理由;
(3)请添加一个条件,使四边形ADPE为正方形,并加以证明.
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