如图,点A的坐标为(6,0),点B为y轴的负半轴上的一个动点,分别以OB,AB为直角边在第三、第四象限作等腰Rt△OBF,等腰Rt△ABE,连接EF交y轴于P点,当点B在y轴上移动时,PB的长度为( )
![](https://img.xkw.com/dksih/QBM/2014/5/13/1573727315353600/1573727320621056/STEM/f3cfe0e7-bea9-4b8f-b4d7-208f22dc05da.png?resizew=160)
![](https://img.xkw.com/dksih/QBM/2014/5/13/1573727315353600/1573727320621056/STEM/f3cfe0e7-bea9-4b8f-b4d7-208f22dc05da.png?resizew=160)
A.2 | B.3 |
C.4 | D.PB的长度随点B的运动而变化 |
更新时间:2016-12-05 20:19:20
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【知识点】 几何问题(一次函数的实际应用)解读
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