如图,正方形ABCD中,DC=3DF,连接AF交对角线BD于点E,那么S△DEF:S△AEB=____
![](https://img.xkw.com/dksih/QBM/2019/10/29/2322500310777856/2326893471170561/STEM/238426ed490f4322bb8c41521984ffad.png?resizew=116)
更新时间:2019-11-04 22:59:47
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【知识点】 相似三角形的判定与性质综合
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【推荐1】一副三角板按图1放置,O是边
的中点,
.如图2,将
绕点O顺时针旋转
,
与
相交于点G,则
的长是___________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836ca16af57d0d543f947052fe269271.png)
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【推荐2】在直角△ABC中,∠C=90°,CD⊥AB,由____ ∽____ ,可得AC2=AD·AB.
![](https://img.xkw.com/dksih/QBM/2021/3/2/2669360178348032/2670882551242752/STEM/2013adb6-3c06-40c1-8a7c-c097ae7716d1.png)
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