如图,正五边形ABCDE与
是位似图形,O是位似中心,若正五边形
与正五边形ABCDE的面积之比为4:1,且正五边形ABCDE的周长为9,则正五边形
的周长是为( )
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734108116697088/2800018765422592/STEM/d04013b26cb2410cafc2c2fe1a4ec9c7.png?resizew=291)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4c60532333025c79fed9b7feab9a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4c60532333025c79fed9b7feab9a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4c60532333025c79fed9b7feab9a84.png)
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734108116697088/2800018765422592/STEM/d04013b26cb2410cafc2c2fe1a4ec9c7.png?resizew=291)
A.18 | B.27 | C.36 | D.9 |
更新时间:2021-09-08 15:18:06
|
【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)
【推荐1】如图,
与
是位似图形,点O是位似中心,且
的面积为4.若
,则
的面积为( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/1d795cc7-e07a-4a24-991f-194766bc9686.png?resizew=197)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed72f62eed6e3793383845285498a869.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/1d795cc7-e07a-4a24-991f-194766bc9686.png?resizew=197)
A.8 | B.12 | C.20 | D.36 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】如图,
和
是以点
为位似中心的位似图形,
的周长为8,则
的周长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d235a67612b7c3cee7411b30f6d59a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/b2131159-7d36-450d-a16b-c1015bbc3527.png?resizew=150)
A.12 | B.18 | C.20 | D.30 |
您最近一年使用:0次