An arc of a circle of length 13cm subtends an angle of 1.62 radians. What is the radius of the circle?

[匿名]

2016-05-01 7:44 am

回答 (2)

用戶7639

2016-05-01 7:57 am

13=1.62*radius
radius=8.02cm

參考: http://www.mathwarehouse.com/trigonometry/radians/images/picture-s=r-theta-circle.gif

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Como

2016-05-01 9:54 am

13 = [ 2π r / 1•62 ]
1•62 x 13 / [ 2π ] = r
r = 3•35 cm

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