F.3 Maths(rotational symmetry)
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2009-10-20 5:46 am
✔ 最佳答案
The following picture was drew by myself so it may a little bit strange...圖片參考：http://img27.imageshack.us/img27/428/142us.jpg
參考: Myself
收錄日期: 2021-04-23 22:39:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091015000051KK01348