Area and Volumes

👨🏻‍🏫 學術台數學

2009-04-10 3:56 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@N06/3425664363/

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)

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