求未知數。
http://www.Photo-Host.org/view/63691945415.jpg
maths~!
2008-06-15 11:20 pm
回答 (1)
2008-06-15 11:58 pm
✔ 最佳答案
∠TRS : ∠TSR = 2 : 3 (Arc ratio = Angle ratio at circumference)So ∠TSR = 3x/2
Hence x + 3x/2 = 90 and x = 36
Finally: ∠QRS : ∠TRS = 72 : 36 = 2 : 1
So y = 4
參考: My Maths knowledge
收錄日期: 2021-04-23 20:32:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080615000051KK01426