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聯立方程 x 1
2010-02-21 3:23 am
回答 (1)
2010-02-21 3:31 am
✔ 最佳答案
A + C + 90 = 180....(1)A - 24 = C....(2)
代(2)入(1) :
A + (A - 24) + 90 = 180
2A - 24 = 90
A = 57
C = 57 - 24 = 33
ㄥA = 57°
ㄥC = 33°
收錄日期: 2021-04-21 22:07:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100220000051KK01545