The figure shows a plectrum(彈奏片)(a small piece of plastic which is used ofplucking of a guitar).
The plectrum is formed by a sector and two congruent right-angled triangles.
Find θ(correct your answer to the nearest degree.)
The figure :http://i194.photobucket.com/albums/z30/skywalker_handsome/aeea1bd0.jpg
F.2 Area of Sectors
2008-05-17 10:46 pm
回答 (1)
2008-05-17 11:33 pm
✔ 最佳答案
Let x be the angle BAOTan x = 1.6/1.2
x = 53.12
θ= 360 - 2x
= 273.76
=274
收錄日期: 2021-04-25 13:43:54
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https://hk.answers.yahoo.com/question/index?qid=20080517000051KK01515