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help me to answer that Qs above
請寫清楚步驟，不要跳steps!!!!
maths
2008-03-24 2:32 am
回答 (1)
2008-03-24 3:27 am
✔ 最佳答案
∠OCA=∠OAC (base ∠s, isos.)∠BOA=∠OAC+∠OCA=2∠OCA ( ext. ∠ of Δ )
∠BOT=∠AOT (property of tangent)
∠BOA=2∠AOT=2∠OCA
∠AOT=∠OCA
AC//TO (corr. ∠s)
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080323000051KK02284