如图,四边形
是正方形,M是
边上的一点,E是
的中点,
平分
.
与
的数量关系,并说明理由;
(2)求证:
;
(3)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e385b42f17d8d22605e6fb2b6c51895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f9c3b578fc0598d5ec6c79404c6cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a78990f59de17e1327c0b6751e425b.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3ba528adff5d4f3a26a03df3eaecce.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
22-23八年级下·山东临沂·期中 查看更多[3]
山东省临沂市费县2022-2023学年八年级下学期期中数学试题湘教版八年级下册第2章四边形单元测试数学试题(已下线)专题05 矩形与正方形(考点清单+17种题型解读)-2023-2024学年八年级数学下学期期中考点大串讲(苏科版)
更新时间:2023-05-13 11:56:29
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解答题-证明题
|
适中
(0.65)
【推荐1】在四边形
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/91272c23-2c0e-46cd-aa58-f3cbda7e85e9.png?resizew=441)
(1)如图1,若
平分
交
于点E,求证:
;
(2)如图2,点G、F分别在
、
上,点H为
上方一点,连接
、
,求证:
;
(3)在(2)的条件下,如图3,过点A作AK//GH,连接
,
平分
,作
的平分线交
于点N,若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa1162d5481e2441fe5bc0d49a576b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cfd06965af6014208127f2880b476b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/91272c23-2c0e-46cd-aa58-f3cbda7e85e9.png?resizew=441)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b02bbd279ada752310d27d729e6ac55.png)
(2)如图2,点G、F分别在
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dba6067dca8b38b75b93aca1200b8ff.png)
(3)在(2)的条件下,如图3,过点A作AK//GH,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0b1de843001edd5480e8866ae584ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83b107f0dd7fd67d95acf0d1a545145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a042ae4e069597d1bce612bd3bef7f01.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,直线AB,CD相交于点O,OF⊥CD,垂足为O,且OF平分∠AOE.若∠BOD=20°,求∠EOF的大小.
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解答题-证明题
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名校
【推荐1】已知:如图,AD、BC相交于点O,AD=BC,∠C=∠D=90°.
求证:AO=BO.
求证:AO=BO.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/a6a20417-794e-442a-b9c1-9a6ead9af3f7.png?resizew=208)
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解答题-证明题
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适中
(0.65)
【推荐2】已知:如图,在等腰三角形
中,
,且
于点
交
的延长线于点
,连接
.请写出
与
的关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d78fc7fcb2762de28dcef8aa3aa0e49.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e0bf85d584f05963b6731f31eb2691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/13/1a08e209-dfda-4e2e-aaa7-3ea9d5fc2d2e.png?resizew=152)
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解答题-证明题
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适中
(0.65)
名校
【推荐1】如图,在平行四边形ABCD中,P是AB上一点(不与点A,B重合),CP=CD,过点P作PQ⊥CP,交AD于点Q,连接CQ,∠BPC=∠AQP.
(1)求证:四边形ABCD是矩形;
(2)当AP=3,AD=9时,求AQ和CQ的长.
(1)求证:四边形ABCD是矩形;
(2)当AP=3,AD=9时,求AQ和CQ的长.
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解答题-证明题
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适中
(0.65)
【推荐2】如图,四边形
中,对角线
相交于点O,
,且
.
是矩形.
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d0b0b7d07ac1aebab6b6f1e8c6acdc.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68cdfda89ec0aae0b683bf6c0257e077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】已知正方形ABCD的边长为1,一个以点A为顶点的45°角绕点A旋转,角的两边分别与边BC、DC的延长线交于点E、F,连接EF.设CE=a,CF=b.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/13/7d290e4f-b750-48aa-aeed-fe59d6295875.png?resizew=553)
(1)如图1,当∠EAF被对角线AC平分时,
①求∠AEC的度数;
②求a、b的值;
(2)当△AEF是直角三角形时,求a、b的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/13/7d290e4f-b750-48aa-aeed-fe59d6295875.png?resizew=553)
(1)如图1,当∠EAF被对角线AC平分时,
①求∠AEC的度数;
②求a、b的值;
(2)当△AEF是直角三角形时,求a、b的值.
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,
,
平分
,
平分
的外角
,垂足为F.
(1)求证:四边形
是矩形.
(2)当四边形
是正方形时,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/9/64f33523-2f01-4c08-a02a-fe4f16d92bad.png?resizew=176)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
(2)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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