正方形ABCD边长为4,M、N分别是BC、CD上的两个动点,当M点在BC上运动时,保持AM和MN垂直,若要使Rt△ABM∽Rt△AMN,则BM的值为_________ .
![](https://img.xkw.com/dksih/QBM/2020/11/8/2588657549746176/2589436657713152/STEM/30d8c2d53f314e06a56ecc858fe34be3.png?resizew=108)
更新时间:2020-11-09 21:25:16
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