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F.4MATHS QUESTION
2009-03-08 9:08 pm
回答 (1)
2009-03-08 9:21 pm
✔ 最佳答案
Joint BT ,then △TBC ~ △ACTwe have AT / AB = AC / AT
8 / AB = (AB + 12) / 8
AB^2 + 12AB - 64 = 0
(AB - 4)(AB + 16) = 0
AB = 4 or AB = - 16 (rejected)
2009-03-08 13:22:58 補充：
The answer is (B) : 4 cm
2009-03-08 14:27:22 補充：
Corrections: △TBC ~ △ACT change to 『△ATB ~ △ACT』,
sorry for my mistake !
收錄日期: 2021-04-21 22:06:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090308000051KK00765