如图,在
中,
是
上一点,连接
.要使
,则必须有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d768c9df50aba8927de085b484ba42b.png)
________ 或![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31caa2b7573adec114105223d5cd052.png)
________ 或![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c8d531a1b39fce29df3f18423cd4ff.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a1121b35cde417fbb46def2105749a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d768c9df50aba8927de085b484ba42b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31caa2b7573adec114105223d5cd052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c8d531a1b39fce29df3f18423cd4ff.png)
![](https://img.xkw.com/dksih/QBM/2018/10/20/2057653776646144/2064728766627840/STEM/1cf2578e87c94907b4a67c8d702822b7.png?resizew=146)
更新时间:2018-10-30 16:10:42
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【知识点】 选择或补充条件使两个三角形相似解读
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【推荐1】如图,已知:∠DAC=∠EAB,如果要使△ABC∽△AED,那么还要补充一个条件 .
![](https://img.xkw.com/dksih/QBM/2013/3/14/1573615509676032/1573615561342976/STEM/bb83a4c8-7ddb-4ab6-aba6-0d606c3504f3.png)
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【推荐2】如图,点D是△ABC的边AB上的一点,AD=6,BD=2,当AC=______ 时,△ABC∽△ACD.
![](https://img.xkw.com/dksih/QBM/2014/11/25/1573759267061760/1573759273033728/STEM/cc47b46641124fc4abb48d28be964662.png?resizew=114)
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