A circle has a radius of 10m. Find the length s of the arc intercepted by a central angle of 26°?
2016-05-31 6:03 pm
Do not round any intermediate computations, and round your answer to the nearest tenth.
回答 (5)
2016-05-31 6:08 pm
✔ 最佳答案
r=10mC=2pir
s=2pir*(26/360)
s=2pir*13/180
s=260pi/180
s=13pi/90
s=0.5m
2016-05-31 6:26 pm
s = rθ, where θ is in RADIANS
= 10·26(π/180)
≅ 0.45
= 4.5 m
= 10·26(π/180)
≅ 0.45
= 4.5 m
2016-05-31 6:09 pm
(10 m)(2*pi)(26/360) = use calculator.
Should come out AROUND five meters.
Should come out AROUND five meters.
2016-05-31 6:59 pm
L = [ 26 / 360 ] x 2π x 10 m
L = 4•5 m
L = 4•5 m
2016-05-31 6:15 pm
Well, you know how to find the circumference of the whole circle, right?
And you know that the circle encompasses 360 degrees, right?
So just take the circumference x (26/360).
And you know that the circle encompasses 360 degrees, right?
So just take the circumference x (26/360).
收錄日期: 2021-04-21 18:50:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160531100328AAe6nRV