求下列各圖中的x
(ftp://ftp.php0h.com/htdocs/antony.jpg)
AC:p0_1606822
PW:27756472
F1 maths (15 marks)
2008-02-25 1:13 am
回答 (2)
2008-02-25 3:41 am
✔ 最佳答案
180∘-(5x+55∘)=∠ABC (adj. ∠s on st. line)......
∠ABC = 125∘-5x
∠ACB = 85∘ (vert. opp. ∠s)
(125∘-5x)+3x+85∘=180∘(∠ sum of △)
....
x=15∘
參考: me
收錄日期: 2021-04-13 15:12:14
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080224000051KK03057