如图,四边形
是菱形,对角线
、
相交于点
,过点
作
于点
,连接
,
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/b568f4ca-1c48-44fb-aa40-3cb7a21b464c.png?resizew=212)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7cf70f8772d8fea4599b18df2c88f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7c2d7e9d0c54e42cec251084fc1d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eaa943e4cf371ff37575d1479ff003f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/b568f4ca-1c48-44fb-aa40-3cb7a21b464c.png?resizew=212)
A.![]() | B.![]() | C.![]() | D.![]() |
22-23八年级下·全国·期中 查看更多[1]
(已下线)期中夯实基础60题必刷题专训(第十六、十七、十八章)-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)
更新时间:2023-04-16 00:07:38
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【推荐1】下列说法不正确的是( )
A.若∠1=∠2,则∠1,∠2是对顶角 |
B.若∠1,∠2都是直角,则∠1=∠2 |
C.若∠1=∠2,则∠1+∠3=∠2+∠3 |
D.若∠1+∠3=90°,∠2+∠3=90°,则∠1=∠2 |
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【推荐2】如图是两条直线平行的证明过程,证明步骤被打乱,则下列排序正确的是( )
如图,已知
,
,求证:
与
平行.证明:
①:
;
②:
,
;
③:
;
④:
;
⑤:
.
![](https://img.xkw.com/dksih/QBM/2022/12/30/3141834002530304/3144253399449600/STEM/672552853b4f4b0bbf175cb6de444600.png?resizew=150)
如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ce9ef89a466df68124a1dccff5663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920a72e27ea5ab70a589b49d34b88275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd81adb13f5a7550b0f94f770900a613.png)
②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dd8402e5a8e9b11ee8fa786a61f8bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4d67aa2a39c15abaa0cbc09432f1fb.png)
③:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0bd8869f34219e7fbe5a9b8842667c1.png)
④:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e26895bd023fc7f392b30cf7d05511.png)
⑤:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ce9ef89a466df68124a1dccff5663.png)
![](https://img.xkw.com/dksih/QBM/2022/12/30/3141834002530304/3144253399449600/STEM/672552853b4f4b0bbf175cb6de444600.png?resizew=150)
A.①②③④⑤ | B.②③⑤④① | C.②④⑤③① | D.③②④⑤① |
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【推荐1】如图在菱形
中,对角线
相交于点O,E是
的中点,连接
,若
,则在菱形
的周长为( )
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb64fd1f40f9b14a8615fd1829a68988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/fe21d148-69a3-446b-9466-4236b55bb6b4.png?resizew=220)
A.8 | B.12 | C.16 | D.20 |
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【推荐2】如图,菱形
的对角线交于点O,E为
边的中点,如果菱形的周长为16,那么
的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/f09b93de-b291-4973-acbc-5d0f07f08b50.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/f09b93de-b291-4973-acbc-5d0f07f08b50.png?resizew=176)
A.2 | B.3 | C.4 | D.6 |
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【推荐1】过等腰
的顶点
画线段
,使得线段
与
边平行且相等,则下列命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.若![]() ![]() | B.若以![]() ![]() |
C.若![]() ![]() | D.若以![]() ![]() |
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【推荐2】下列说法中,错误的是( )
A.菱形的对角线互相垂直 | B.矩形的四个内角都相等 |
C.对角线互相垂直的四边形是菱形 | D.四个内角都相等的四边形是矩形 |
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