Area and Volumes

👨🏻‍🏫 學術台數學

2009-04-10 5:19 am

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/

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)

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