如图,
、
在平行四边形
的对角线
上,
,
,
,则
的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf2ee47dda2f39a856411c7d3f279a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40ce07f7c4655d05759466062ef8eebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb476b0dac9799c720354d30b3a85c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9d36476ec148937f6ed37d2dc461cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-07-06 20:19:59
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【推荐1】如图,在△ABC中,∠B=75°,∠ACD=55°,
,则∠ACB的度数是( )
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894348812902400/2951094730481664/STEM/3fae3e50-f9be-4b3a-b993-3e388aba21be.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aad38b43462ca7a8fb9bc9484ad3a0.png)
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894348812902400/2951094730481664/STEM/3fae3e50-f9be-4b3a-b993-3e388aba21be.png?resizew=140)
A.50° | B.55° | C.60° | D.65° |
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【推荐2】下列语句正确的有几个?( )
①一组对边平行,另一组对边相等的四边形是平行四边形
②对角线相等的四边形是矩形
③下列各数中3.14,
,1.090090009…,
,0,3.1415是无理数的有2个
④内错角相等
⑤顺次连结矩形各边的中点所得的四边形是菱形
①一组对边平行,另一组对边相等的四边形是平行四边形
②对角线相等的四边形是矩形
③下列各数中3.14,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598564aec706dff769c5afc4c378c572.png)
④内错角相等
⑤顺次连结矩形各边的中点所得的四边形是菱形
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐1】如图,将△ABC绕点B顺时针旋转α,得到△EBD,若点E恰好在AC的延长线上,则∠CED的度数为( )
![](https://img.xkw.com/dksih/QBM/2022/4/26/2973562375847936/2984856357666816/STEM/aa5f236c-998d-4b79-b9b4-a03d0a43a66a.png?resizew=197)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2973562375847936/2984856357666816/STEM/aa5f236c-998d-4b79-b9b4-a03d0a43a66a.png?resizew=197)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,点A,B,C均在
上,
,若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/a745e506-4ce1-4703-a24b-c75a6b208030.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e56feb858a38f68412d4d7691fcf86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/a745e506-4ce1-4703-a24b-c75a6b208030.png?resizew=148)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在
中,将
沿
折叠后,点
恰好落在
的延长线上的点
处.若
,
,则
的周长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/9501f4ac-5bba-40ea-ad5c-6c3f5bbdae38.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/9501f4ac-5bba-40ea-ad5c-6c3f5bbdae38.png?resizew=148)
A.3 | B.6 | C.![]() | D.9 |
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【推荐2】如图,四边形
是平行四边形,O是对角线
与
的交点,
,若
,
,则
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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A.20 | B.21 | C.22 | D.23 |
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【推荐1】下列说法中错误的是( )
A.直角三角形斜边上的中线等于斜边的一半 |
B.等底等高三角形的面积相等 |
C.三角形的中位线平行于第三边,并且等于第三边的一半 |
D.如果三角形两条边的长分别是a、b,第三边长为c,则有a2+b2=c2 |
您最近一年使用:0次
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【推荐2】如图,
,
,
与
交于点
,点
是
的中点,
.若
,
,则
的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/0dc4da7d-db0b-43b4-b0cb-5fee3146601c.png?resizew=94)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/0dc4da7d-db0b-43b4-b0cb-5fee3146601c.png?resizew=94)
A.![]() | B.3 | C.![]() | D.![]() |
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