anonymous
  • anonymous
Medal award! Find the arc length along a circle of diameter 9.5 meters which subtends an angle of 1.9 radians
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
diameter=9.5 m radius r=?
anonymous
  • anonymous
4.75
anonymous
  • anonymous
correct. \[\theta=\frac{ l }{ r },l=r \times \theta \] where l= length of arc r=radius if circle \[\theta=angle~of~arc(in~radians)\]

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anonymous
  • anonymous
can you solve?
anonymous
  • anonymous
so I have 4.75*9.5?
anonymous
  • anonymous
4.75*1.9
anonymous
  • anonymous
correct.
anonymous
  • anonymous
so I would just need to input 1.9pi*4.75? Because I tried that and it mentioned that it was incorrect
anonymous
  • anonymous
4.75*1.9=9.025 m
anonymous
  • anonymous
thanks so much :)
anonymous
  • anonymous
why are you writing pi ? angle is already given in radians.
anonymous
  • anonymous
when angle is given in degrees then you need to change it in radians.
anonymous
  • anonymous
yep :) I messed up but the 9.025 is correct! Thanks so much
anonymous
  • anonymous
yw

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