maths-circle
2011-02-02 2:43 am
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In the figure, O is the centre of the circle. ∠AOB and ∠BOC are equal angles. arcAB=7, arcAC=4. Find the circumference.
回答 (1)
2011-02-02 2:55 am
✔ 最佳答案
Since ∠ AOB = ∠BOC,arc AB = arc BC =7 (equal angle equal arc)
The circumference
= arcAB + arcBC +arcAC
= 7+7+4
= 18
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110201000051KK01042