如图,已知六棱锥P-ABCDEF的底面是正六边形,PA⊥平面ABC,PA=2AB,则下列结论正确的是___________ .
![](https://img.xkw.com/dksih/QBM/2020/12/29/2624608064864256/2632394234216448/STEM/367ae3ec2da14f9c98ab83629740f372.png?resizew=179)
①PB⊥AD;
②平面PAB⊥平面PBC;
③直线BC
平面PAE;
④∠PDA=45°
![](https://img.xkw.com/dksih/QBM/2020/12/29/2624608064864256/2632394234216448/STEM/367ae3ec2da14f9c98ab83629740f372.png?resizew=179)
①PB⊥AD;
②平面PAB⊥平面PBC;
③直线BC
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
④∠PDA=45°
更新时间:2021-01-09 14:02:41
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