1 . 已知
=
,那么下列等式中一定正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7bf9200b351a259ddfc6c0266129d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-10-01更新
|
140次组卷
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2卷引用:4.1成比例线段第2课时(课前练)
2 . 两条直线被一组平行线所截,所得的对应线段成比例.如:
____ ,
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af16f828b762b5c079c98eef6bc3bcda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b05491affc0fadeb4b92537f3dcb6ac.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898732065390592/2899395944357888/STEM/8896661b-c082-4abd-854c-c1ed55b586e6.png?resizew=200)
您最近一年使用:0次
2022-01-21更新
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286次组卷
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2卷引用:27.2.1.1相似三角形及平行线分线段成比例(课前预习)
3 . 平行于三角形一边的直线截其他两边(或两边的延长线),所得的对应线段成比例.如:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b385329fa0199e30da2ccfdf559ebf70.png)
____ ,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b385329fa0199e30da2ccfdf559ebf70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/e67bbe11-20ba-4d47-bc60-0d3cda5eb4ee.png?resizew=211)
您最近一年使用:0次