Determine whetherPQ is the tangent to the circle at T
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circle
2011-08-07 11:53 pm
回答 (1)
2011-08-08 3:42 am
✔ 最佳答案
Notice that 2x + (5/2)x = 180x = 40 and 2x = 80
As angle CPT = angle CBT, PQ is the tangent to the circle at T
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110807000051KK00625