在大小为
的正方形网格中,下列四个选项中的三角形,与下图所示的三角形相似的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb9d60d456560e9bac66c8b20c49bb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/aebaf947-0c55-4990-a0da-2babe29543fb.png?resizew=110)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-07-26 14:33:00
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【推荐1】图1中,每个小正方形的边长为1,
的三边a,b,c的大小关系是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/3/9f4b3408-696f-4985-b904-e07e01485a62.png?resizew=138)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/3/9f4b3408-696f-4985-b904-e07e01485a62.png?resizew=138)
A.a<c<b | B.a<b<c | C.c<a<b | D.c<b<a |
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【推荐2】如图,在
的正方形网格中,每个小正方形边长为1,点A,B,C均为格点,以点A为圆心,
长为半径作弧,交格线于点D.则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在▱ABCD中,F是AD延长线上一点,连接BF交DC于点E,则图中相似三角形共有( )对.
![](https://img.xkw.com/dksih/QBM/2018/3/14/1902176322461696/1904338985492480/STEM/d889ef70c0134cec9d1fd99f8dbc8b01.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/2018/3/14/1902176322461696/1904338985492480/STEM/d889ef70c0134cec9d1fd99f8dbc8b01.png?resizew=215)
A.2对 | B.3对 | C.4对 | D.5对 |
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【推荐2】如图,AB∥CD,AD与BC交于点O,AD:OD=5:3,则S△AOB:S△DOC=( )
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893434998005760/2919090264514560/STEM/ab96241503fc4fc4873a31b93c7cd9bd.png?resizew=123)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893434998005760/2919090264514560/STEM/ab96241503fc4fc4873a31b93c7cd9bd.png?resizew=123)
A.2:3 | B.9:25 | C.4:9 | D.9:4 |
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