正方形
的边长为
,点
,
在对角线
上(可与点
,
重合),
,点
,
在正方形的边上.下面四个结论中,
①存在无数个四边形
是平行四边形;
②存在无数个四边形
是菱形;
③存在无数个四边形
是矩形;
④至少存在一个四边形
是正方形.
正确的结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/46e5c289b8aabdbfba95c7fd1e1842f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
①存在无数个四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
②存在无数个四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
③存在无数个四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
④至少存在一个四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
正确的结论的个数是( )
A.1个 | B.2个 | C.3个 | D.4个 |
更新时间:2024-05-13 12:40:03
|
相似题推荐
单选题
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名校
【推荐1】如图,在菱形
中,
,
,点
是
的中点,过点
作
,垂足为
,将
沿点
到点
的方向平移,得到
,设点
、
分别是
、
的中点,当点
与点
重合时,四边形
的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/34f8734f-2268-4ec7-b5cd-e618278eb842.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e2c2b4ecbbd7084dc5327d74cd6740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f089037fab6610f1883f553bf52d5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e07b15cfb3b56c8a836832a85c0d1ef.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464ce0cb4d6bbc768ef3a39ab473f265.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/34f8734f-2268-4ec7-b5cd-e618278eb842.png?resizew=179)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】下列说法正确的是( )
A.对角线相等的四边形是平行四边形 | B.对角线垂直的四边形是菱形 |
C.三个角都是直角的四边形是矩形 | D.一组邻边相等的平行四边形是正方形 |
您最近一年使用:0次
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【推荐1】甲乙丙三人用同一张矩形纸张接力进行如图所示的操作:甲任意画一个
,折叠纸张使得点
与点
重合,折痕与
边交于点
;乙再折出射线
,点
在
延长线上;丙再折叠纸张使得
落在
上,点
对应点为点
,连接
;则下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac31b9badf70a20d3b7d15f72da16d9.png)
A.四边形![]() |
B.![]() ![]() ![]() |
C.若![]() ![]() |
D.若射线![]() ![]() ![]() |
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【推荐2】如图,在等腰
中,
是
的高线,E是边
上一点,分别作
于点F,
于点G,《几何原本》中曾用该图证明了
.过点B作
于点H,若四边形
的周长为20,且图中阴影部分的面积和为14,则四边形
的面积为( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/bde531ed-911b-4dd9-aad8-7a434c03729d.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd27b64b553f69d1f8f550b9d5b093c.png)
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A.20 | B.22 | C.24 | D.28 |
您最近一年使用:0次
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【推荐1】如图,在
中,
,
的角平分线交AC于点D,过点D分别作BC和AB的平行线,交AB于点E,交BC于点H,连接EH交BD于点G,在AE上截取
,连接DF.下列说法中正确的是( )
①
;②
;③四边形EBHD是菱形;④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f97b448f9d088c95fe96d85e26c4cf.png)
![](https://img.xkw.com/dksih/QBM/2021/11/29/2861746513133568/2863245326163968/STEM/09b8ce47-fcda-496a-8204-c16dd69de86d.png?resizew=143)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cbd1d4bdcf1199ec44f9ba5348ac42.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b695e6aa092f4c7cc0502f37c072d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092e11861f7e81d997b93850ab9a0d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f97b448f9d088c95fe96d85e26c4cf.png)
![](https://img.xkw.com/dksih/QBM/2021/11/29/2861746513133568/2863245326163968/STEM/09b8ce47-fcda-496a-8204-c16dd69de86d.png?resizew=143)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
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【推荐2】下列命题中:
①两条对角线互相平分且相等的四边形是菱形;
②菱形的一条对角线平分一组对角;
③若三条线段平方之比是
,则它们组成一个等腰直角三角形;
④两条对角线互相平分的四边形是矩形;
⑤平行四边形对角线相等.
真命题的个数是( )
①两条对角线互相平分且相等的四边形是菱形;
②菱形的一条对角线平分一组对角;
③若三条线段平方之比是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e0dad7976fd682a88e200381d1ed0e.png)
④两条对角线互相平分的四边形是矩形;
⑤平行四边形对角线相等.
真命题的个数是( )
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
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【推荐1】如图,在正方形
中,
,点E,F分别在边
和
上,
,
,则
的长是( )
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】如图,在正方形
中,
.
为正方形外一点,连接
,且
,
,
.过
作
于
,连接
,则
的长度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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A.![]() | B.12 | C.![]() | D.15 |
您最近一年使用:0次