如图,已知OC平分∠AOB,CD//OB,若OD=3cm,则CD=___________ cm.
![](https://img.xkw.com/dksih/QBM/2017/12/21/1843223155695616/1844592263512064/STEM/b650baf56bba49f2a616c24970e32da4.png?resizew=133)
17-18八年级上·湖南怀化·期中 查看更多[12]
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更新时间:2017-12-23 12:55:28
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【推荐2】Rt△ABC在直角坐标系中的位置如图所示,∠BAC=90°,AB⊥x轴,B(-3,0),C(0,6),将△ABC沿BC折叠,点A落在点A′处,则点A′的坐标是______________ .
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