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[几何] 轨迹问题

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lrh2006 posted 2021-4-24 10:36 |Read mode
Last edited by lrh2006 2021-4-24 10:44如图,在平面直角坐标系中,点D是平行四边形OABC的对角线OB的中点,OA=8,OC=4√3,∠COA=60°,点E是OC边上的任意一点,连结DE,将DE绕点D逆时针方向旋转90°到DF,则当点E从点O运动到点C的过程中,点F的轨迹是什么?用初中的知识,怎么解?以及有没有秒杀的方法?
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kuing posted 2021-4-24 12:21
OC 绕 D 旋转 90 度不就是了吗

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original poster lrh2006 posted 2021-4-24 18:59
回复 2# kuing


    唉,智商不够用,好难过

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kuing posted 2021-4-24 19:03
回复 3# lrh2006

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isee posted 2021-4-24 20:18
回复  kuing


    唉,智商不够用,好难过
lrh2006 发表于 2021-4-24 18:59
哈哈哈哈哈哈

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