如图,在矩形ABCD中,边AB的长为3,点E,F分别在AD,BC上,连接BE,DF,EF,BD.若四边形BEDF是菱形,且EF=AE+FC,则边BC的长为 ( )
![](https://img.xkw.com/dksih/QBM/2018/5/24/1952150136872960/1954063327559680/STEM/18b3709d2f4a4e35a6cbea12913d6322.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/2018/5/24/1952150136872960/1954063327559680/STEM/18b3709d2f4a4e35a6cbea12913d6322.png?resizew=143)
A.![]() | B.2![]() | C.3![]() | D.6![]() |
更新时间:2018-05-27 04:54:55
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】如图所示,在Rt△ABC中,∠C=90°,按以下步骤作图:
①以点A为圆心,以小于AC的长为半径作弧,分别交AC、AB于点M,N;
②分别以点M,N为圆心,以大于
MN的长为半径作弧,两弧相交于点O;
③作射线OA,交BC于点E,若CE=6,BE=10.
则AB的长为( )
![](https://img.xkw.com/dksih/QBM/2020/7/4/2498400051822592/2499410622210048/STEM/b9d7c378d6784af3b3b5a8b1d696b984.png?resizew=179)
①以点A为圆心,以小于AC的长为半径作弧,分别交AC、AB于点M,N;
②分别以点M,N为圆心,以大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
③作射线OA,交BC于点E,若CE=6,BE=10.
则AB的长为( )
![](https://img.xkw.com/dksih/QBM/2020/7/4/2498400051822592/2499410622210048/STEM/b9d7c378d6784af3b3b5a8b1d696b984.png?resizew=179)
A.11 | B.12 | C.18 | D.20 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】在直线 l 上依次摆放着七个正方形(如图所示),已知斜放置的三个正方形的面积分别 为 a,b,c,正放置的四个正方形的面积依次为 S1,S2,S3,S4,则 S1+S2+S3+S4=( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/f9d1569d-06d7-4661-99f5-ee43ed5ddfd6.png?resizew=300)
A.a+b | B.b+c | C.a+c | D.a+b+c |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】在矩形
中,
,点E在边
上,点F在边
上,联结
、
、
,
,以下两个结论:①
;②
.其中判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09a9a6f020159406608000cf93d4fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95ac1de3cedf2a21461db99e53162c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed98d75c522915d51fb477a4bfac01e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5927d5cc31b7230f33bc3df7fc3454.png)
A.①②都正确 | B.①②都错误; |
C.①正确,②错误 | D.①错误,②正确 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,矩形
的对角线
相交于点O,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd5bb46e56893ccef7ec95637149025.png)
,若
,则四边形
的周长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d0b0b7d07ac1aebab6b6f1e8c6acdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd5bb46e56893ccef7ec95637149025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fad0420f4415b66107f9d72455e1616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99399ce175a0f5d0a7a6a82d81b6af7f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/27/fa8acfd5-465f-4d11-b00e-130be870af83.png?resizew=100)
A.10 | B.8 | C.6 | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】如图,在菱形ABCD中,E,F分别在AB,CD上,且BE=DF,EF与BD相交于点O,连结AO.若∠CBD=35°,则∠DAO的度数为( )
A.35° | B.55° | C.65° | D.75° |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】则在![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
中,
的平分线交直线
于点
,交直线
于点
,若
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87448e09eaa816e50ae92d111d5ded6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
,
,分别连接
、
、
,
的大小是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827d77011af6d7cbfca37ed0f8229526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c858454c801c04de4c11d1ed132f147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87448e09eaa816e50ae92d111d5ded6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5362d18c22c2b55502b51e20c986fe24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c3f982d999937891eec4cb22d62e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935ad59079c158ea0f92018fc548e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999a995a6d07c561ce64e8952994160a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc1667a1467a28db775d7d487bb8498.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/4158b41f-eb78-4016-8af7-e8d47aa13f08.jpg?resizew=160)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次