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[几何] 异面直线相关的轨迹问题

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lemondian Posted 2021-12-10 14:54 |Read mode

已知异面直线$a,b$所成的角为$60\du $，其公垂线$MN$的长度为2，长度为4的线段$PQ$的两端点分别在直线$a,b$上运动，则$PQ$中点的轨迹是什么？

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kuing Posted 2021-12-10 15:00

和 forum.php?mod=viewthread&tid=6834 一样

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