如图,已知矩形
中,
与
相交于
,
平分
交
于
,
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467719840530432/2468717774716928/STEM/c36e12fa-5e97-45f7-a322-5607130f847a.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d9e7ef53045ebea91d4e9305c12ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467719840530432/2468717774716928/STEM/c36e12fa-5e97-45f7-a322-5607130f847a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-05-23 08:02:04
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【推荐1】下列命题中的真命题是( )
A.同位角相等 |
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【推荐2】
中,
,
,
的对边分别记为a,b,c,由下列条件不能判定
为直角三角形的是( )
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A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐1】如图,在边长为
的正六边形
中,连接BE,
,相交于点O,若点
分别为
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的中点,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27567d43c5b91382ee3d7ca708ee422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019c0405370c673e37b46c066eba839.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/25554211-f4d9-4963-a6f3-94bfbc98b479.png?resizew=145)
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【推荐2】如图,矩形ABCD中,AC,BD相交于点O,过点B作
交CD于点F,交AC于点M,过点D作
交AB于点E,交AC于点N,连接FN,EM.则下列结论:①
;②
:③
;④当
时,四边形DEBF是菱形.其中,正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/2022/5/3/2971320961761280/2972832699342848/STEM/679403d3-4227-4a16-8948-e07020474b1a.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2a245381e615882ee5feb7793a1df6.png)
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A.1 | B.2 | C.3 | D.4 |
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【推荐1】如图:矩形ABCD的对角线AC=8cm,∠AOD=120°,则AD的长为( )
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421250870288384/2421586092269568/STEM/066069c465864f598a39c15c3ae6043d.png?resizew=132)
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【推荐2】如图,BD为菱形ABCD的一条对角线,E、F在BD上,且四边形ACEF为矩形,若EF=
BD,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2019/7/24/2253799655784448/2291721566969856/STEM/04222aa9e40b4583b549311e1c24e602.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e003ad7604dc766aabcf1f9ec02a3bc.png)
![](https://img.xkw.com/dksih/QBM/2019/7/24/2253799655784448/2291721566969856/STEM/04222aa9e40b4583b549311e1c24e602.png?resizew=184)
A.![]() | B.![]() | C.![]() | D.![]() |
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