如图,
和
是以点O为位似中心的位似图形,点A在线段
上.若
,则
与
的周长之比为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48fce10478485ef01d2318fc3465bb4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d6461aba9b4f4afb39b7be7797aea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
A.1∶2 | B.1∶3 | C.1∶9 | D.3∶1 |
更新时间:2024-03-15 13:58:27
|
【知识点】 求两个位似图形的相似比
相似题推荐
单选题
|
较易
(0.85)
名校
【推荐1】如图,以点
为位似中心,把
放大到原来的
倍得到
,以下说法中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/518741e8-278f-457d-8215-292188a8533c.png?resizew=204)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/518741e8-278f-457d-8215-292188a8533c.png?resizew=204)
A.![]() | B.点A、O、![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】如图,
与
位似,
、
、
分别为OA、OB、OC的中点,若
面积是5,则
的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/fbb2630d-19b0-4c24-9c9d-58ec8e9f9eb0.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/fbb2630d-19b0-4c24-9c9d-58ec8e9f9eb0.png?resizew=170)
A.10 | B.20 | C.25 | D.50 |
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