如图,在平行四边形
中,
交于
点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/9e711014-23af-4eda-b44f-f18f6f6e3af2.png?resizew=235)
(1)求证:四边形
是矩形;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff66e3210774fae818453dc36ea26c51.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/9e711014-23af-4eda-b44f-f18f6f6e3af2.png?resizew=235)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668fc1232abe114c67a46268131d8958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
22-23八年级下·全国·期中 查看更多[2]
(已下线)期中平行四边形、菱形、矩形、正方形的判定与性质证明题专训40题-2022-2023学年八年级数学下册同步考点知识清单+例题讲解+课后练习(人教版)(已下线)专题5.1 矩形的性质与判定(专项训练)-2022-2023学年八年级数学下册《同步考点解读·专题训练》(浙教版)
更新时间:2023-04-15 17:58:39
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】阅读材料:
小明在学习二次根式后,发现一些含根号的式子可以写成另一个式子的平方,如
,善于思考的小明进行了以下探索:设
(其中
,
,
,
均为整数),则有
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
,
,这样小明就找到了一种把类似
的式子化为平方式的方法.请你仿照小明的方法探索并解决下列问题:
(1)当
,
,
,
均为正整数时,若
,用含
,
的式子分别表示
,
,得
________,
________;
(2)若
,且
,
,
均为正整数,求
的值.
小明在学习二次根式后,发现一些含根号的式子可以写成另一个式子的平方,如
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ca9c1b7f888a0c25c96eb7272adb24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947a80c9e0dc369ba142c20642391389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1feb3ba09407029e653733fdfa85cedb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efab18eaf5760012863f7e45d2f7c563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c470388373f20bebd306191029f5643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb18960b2058db313c129b47af60af2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64969956bed6ee95e3c501917d58312e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe05ad04a88740e057df43c5d1298341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
【推荐2】如图,
中,
,点D在BC边上,以CD为直径的⊙O与直线AB相切于点E,且E是AB中点,连接OA.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/b06a7321-d770-45ef-b077-46ad0c967d18.png?resizew=147)
(1)求证:
;
(2)连接AD,若
,求⊙O的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/b06a7321-d770-45ef-b077-46ad0c967d18.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
(2)连接AD,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763c0ed9baecf74b0498c12c6255d4c6.png)
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【推荐1】如图,
中,
,点
分别为
的中点,延长
至
,使
,连结
,其中
与
相交于
.
(1)求证:四边形
是平行四边形.
(2)已知
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3648c864f9f58da1dbb166fee84cfeaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78f0dc06c224ca63d9267c1a550004d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2d5f65668e70289777404642aa27e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/4f843990-42ad-41e4-bc1e-2a9b76192894.png?resizew=141)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9560bb33e8813bb6ebb422ba164b3f91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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名校
【推荐2】(1)解不等式组![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd6d1631de9da55bcb1bbf3530fe27d.png)
(2)如图,
为
内的一点,
垂足分别为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e281483a308c0b397c79af6680c7cf5b.png)
求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd6d1631de9da55bcb1bbf3530fe27d.png)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04db6b9461926db847f9f2377228227a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da4a6232dc038e252544db7d87bfa7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e281483a308c0b397c79af6680c7cf5b.png)
求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/24/a7353758-a93f-44ad-a1a5-1d9cb01f93c9.png?resizew=154)
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【推荐1】平行四边形
中,对角线
,
相交于点
,若
、
是
上两动点,
、
分别从
、
两点同时以
的相同的速度向
、
运动
![](https://img.xkw.com/dksih/QBM/2018/10/8/2049101737697280/2052953922330624/STEM/af73225dce7840a7b123e2367e15bc90.png?resizew=163)
四边形
是平行四边形吗?说明你的理由.
若
,
,当运动时间
为多少时,以
、
、
、
为顶点的四边形为矩形.
![](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/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc114541c729cd8d1132e46c4884413.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2018/10/8/2049101737697280/2052953922330624/STEM/af73225dce7840a7b123e2367e15bc90.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0001e113da20e54793d6a99dd7e5ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776ea92c875b407d66b693a1727de3ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8e3a281f19085fe1920dfa6ae3339d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图所示,在等边三角形
中,
分别是边
,
的中点.连接
,
,过点
作
的平行线交
的延长线于点
,连接
.
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586372156088320/2588027229290496/STEM/82a9a9792f1b445fa604570892b26587.png?resizew=148)
(1)求证:四边形
是矩形;
(2)若
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe964aa3574061970c9c8066df21c89.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586372156088320/2588027229290496/STEM/82a9a9792f1b445fa604570892b26587.png?resizew=148)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
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解答题-作图题
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适中
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【推荐3】(1)画图-连线-写依据:
先分别完成以下画图(不要求尺规作图),再与判断四边形DEMN形状的相应结论连线,并写出判定依据(只将最后一步判定特殊平行四边形的依据 填在横线上).
①如图1,在矩形ABEN中,D为对角线的交点,过点N画直线NP∥DE,过点E画直线EQ∥DN,NP与EQ的交点为点M,得到四边形DEMN;
②如图2,在菱形ABFG中,顺次连接四边AB,BF,FG,GA的中点D,E,M,N,得到四边形DEMN.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/27/f17b1d7b-df82-40e0-8f10-1f1534c51ad5.png?resizew=408)
(2)请从图1、图2的结论中选择一个进行证明.
证明:
先分别完成以下画图(不要求尺规作图),再与判断四边形DEMN形状的相应结论连线,并写出判定依据(只将
①如图1,在矩形ABEN中,D为对角线的交点,过点N画直线NP∥DE,过点E画直线EQ∥DN,NP与EQ的交点为点M,得到四边形DEMN;
②如图2,在菱形ABFG中,顺次连接四边AB,BF,FG,GA的中点D,E,M,N,得到四边形DEMN.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/27/f17b1d7b-df82-40e0-8f10-1f1534c51ad5.png?resizew=408)
(2)请从图1、图2的结论中选择一个进行证明.
![](https://img.xkw.com/dksih/QBM/2017/7/15/1730404594089984/1731378663981056/STEM/1ddea83bd9dd4183907570b6701625ee.png?resizew=337)
证明:
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