2. In the figure, O is the centre of a circle. Find [?].
[?]:
http://www.flickr.com/photos/29635386@N06/3426487386/
p:
http://www.flickr.com/photos/29635386@N06/3425664363/
Area and Volumes
2009-04-10 3:56 am
回答 (1)
2009-04-10 4:04 am
✔ 最佳答案
圖片參考：http://farm4.static.flickr.com/3583/3425664389_96051f6d37.jpg?v=0
這題嗎？
弧AB=2π(5)(90/360)
=5/2π
=7.86(準碓至3位有效數字)
收錄日期: 2021-04-23 20:37:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090409000051KK01777