已知AB//CD,AD与BC相交于点O,若
,AD=15,则DO的长为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475ee3824943ac9ab83b334c68a2e9f7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/3b7737d6-5247-4c70-85f6-50242927e59d.png?resizew=137)
更新时间:2021-11-12 13:55:08
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【知识点】 由平行截线求相关线段的长或比值解读
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【推荐1】直线
.直线
被
,
,
所截,其中截得的两条线段分别为
,
,
是另外一条被
,
,
所截的直线,其中截得的两条线段分别为
,
.小明通过测量出
,
,
,那么
约等于______
.(保留两位小数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a120b008b7be40c9d6f6079bca61652.png)
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【推荐2】如图,在
中,
,
,点
在直线
上,过点
作
交直线
与点
.如果
,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
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