更新1:
Please help
Plane geometry.?
回答 (1)
2015-10-09 9:11 am
✔ 最佳答案
c^2= b^2 + [ b - (b-a) ]^2
= b^2 + a^2
choose (A)
收錄日期: 2021-05-02 14:07:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20151009004505AAOMdaV