p:
http://www.flickr.com/photos/29635386@N06/3425664363/
更新1:
what mean[*]?
Area and Volumes
2009-04-10 3:49 am
1. Find the perimeter of the shaded region in the figure.
p:
http://www.flickr.com/photos/29635386@N06/3425664363/
p:
http://www.flickr.com/photos/29635386@N06/3425664363/
回答 (3)
2009-04-10 4:07 am
✔ 最佳答案
圖片參考：http://farm4.static.flickr.com/3342/3425664363_3492be5869.jpg?v=0
[Given that the radius of the circle is 2cm]
The perimeter of the shaded region
=2*[(1/2)*circumference of the circle]+4+4
=2*[(1/2)*2π(2)]+8
=4π+8
~20.6cm
2009-04-09 21:32:06 補充：
* means product
2009-04-10 4:09 am
the perimeter of the shaded region=4+4+2π(2)
=(8+4π)cm
=(8+4π)cm
2009-04-10 4:05 am
The perimeter of the shaded region in the figure:
( 8 + 4π ) cm
( 8 + 4π ) cm
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090409000051KK01759