如图,在矩形ABCD中,DE⊥AC于E,∠EDC:∠EDA=1:3 ,且AC=12,则DE的长度是( )
![](https://img.xkw.com/dksih/QBM/2019/5/6/2197842306310144/2197919850274818/STEM/9b2ce29c704543098348464c47fae483.png?resizew=172)
![](https://img.xkw.com/dksih/QBM/2019/5/6/2197842306310144/2197919850274818/STEM/9b2ce29c704543098348464c47fae483.png?resizew=172)
A.3 | B.6 | C.![]() | D.![]() |
更新时间:2019-05-16 22:40:16
|
【知识点】 根据矩形的性质求线段长解读
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】如图,在矩形
中,
,
,对角线
,
相交于点O,点E,F分别是
,
的中点,连接
,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/fe6d6524-56f3-4dde-93e3-77405f75eeb0.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.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/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/fe6d6524-56f3-4dde-93e3-77405f75eeb0.png?resizew=139)
A.6 | B.7 | C.8 | D.9 |
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
,
,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/2019/7/5/2240354509783040/2240482170994688/STEM/c5c031778e694d6b94ee17b9b0da025a.png?resizew=276)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212f51a7bab77566031f0b864aa1141e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://img.xkw.com/dksih/QBM/2019/7/5/2240354509783040/2240482170994688/STEM/c5c031778e694d6b94ee17b9b0da025a.png?resizew=276)
A.12 | B.14 | C.16 | D.18 |
您最近一年使用:0次