• 已知平行六面体ABCD-A1B1C1D1,所有棱长都等于l,∠A1AB=∠A1AD=∠BAD=,则A1C的长 :middle;" src="http://tikucommon-zs.oss-cn-beijing.aliyuncs.com/tiku/source/image/12320/swd00848240.png">试题及答案-填空题-云返教育

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      已知平行六面体ABCD-A1B1C1D1,所有棱长都等于l,∠A1AB=∠A1AD=∠BAD=,则A1C的长         :middle;" src='http://tikucommon-zs.oss-cn-beijing.aliyuncs.com/tiku/source/image/12320/swd00848240.png'>

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