1、在Rt△ABC中,D是斜边AB的中点,AC=6,BC=8,EC⊥平面ABC,且EC=12,则ED=?(答案是13)2、如图(H在体对角线A1C上),在正方体ABCD-A1B1C1D1中,AH⊥A1C交于点H,则A1H:HC=?(答案是1:2)3、P为矩形ABCD所在平面
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/30 16:38:26
![1、在Rt△ABC中,D是斜边AB的中点,AC=6,BC=8,EC⊥平面ABC,且EC=12,则ED=?(答案是13)2、如图(H在体对角线A1C上),在正方体ABCD-A1B1C1D1中,AH⊥A1C交于点H,则A1H:HC=?(答案是1:2)3、P为矩形ABCD所在平面](/uploads/image/z/7047621-45-1.jpg?t=1%E3%80%81%E5%9C%A8Rt%E2%96%B3ABC%E4%B8%AD%2CD%E6%98%AF%E6%96%9C%E8%BE%B9AB%E7%9A%84%E4%B8%AD%E7%82%B9%2CAC%3D6%2CBC%3D8%2CEC%E2%8A%A5%E5%B9%B3%E9%9D%A2ABC%2C%E4%B8%94EC%3D12%2C%E5%88%99ED%3D%3F%EF%BC%88%E7%AD%94%E6%A1%88%E6%98%AF13%EF%BC%892%E3%80%81%E5%A6%82%E5%9B%BE%EF%BC%88H%E5%9C%A8%E4%BD%93%E5%AF%B9%E8%A7%92%E7%BA%BFA1C%E4%B8%8A%EF%BC%89%2C%E5%9C%A8%E6%AD%A3%E6%96%B9%E4%BD%93ABCD-A1B1C1D1%E4%B8%AD%2CAH%E2%8A%A5A1C%E4%BA%A4%E4%BA%8E%E7%82%B9H%2C%E5%88%99A1H%EF%BC%9AHC%3D%3F%EF%BC%88%E7%AD%94%E6%A1%88%E6%98%AF1%EF%BC%9A2%EF%BC%893%E3%80%81P%E4%B8%BA%E7%9F%A9%E5%BD%A2ABCD%E6%89%80%E5%9C%A8%E5%B9%B3%E9%9D%A2)
xXKSG+KfA)2)ujwVr@ST3`0c0WAOήt/뙝ծc;J17u+^ut]iyR`u`fܺl:;Q{zW]qMQ^ɹ7r?)˜7bsT<@Ă_av^93QLv>Iܫ"