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@N06/3425664333/
Area and Volumes
2009-04-10 5:19 am
回答 (1)
2009-04-10 5:40 am
✔ 最佳答案
圖片參考：http://farm4.static.flickr.com/3322/3425664333_6f414d78b8.jpg?v=0
弧AB=2π(2)(100/360)
=10π/9cm
=3.49cm(準確至3位有效數字)
收錄日期: 2021-04-23 20:37:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090409000051KK01972