anonymous
  • anonymous
How do you find the arc length?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
http://tutorial.math.lamar.edu/Classes/CalcII/ArcLength.aspx
anonymous
  • anonymous
He gives a bunch of examples in that link.
anonymous
  • anonymous
yeah but all ineed is an equation :P

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anonymous
  • anonymous
It's there in the blue box
anonymous
  • anonymous
Here's a tutorial as well :-) http://www.youtube.com/watch?v=tfn4cpkPHUI Other people way smarter than me can explain it better which is why I provided links lol.
anonymous
  • anonymous
oh okay thank you :P
anonymous
  • anonymous
Do you have a particular problem you're working?
anonymous
  • anonymous
yes
anonymous
  • anonymous
this one: Find the arc length of a sector that is 125° and has a radius of 20 in.
anonymous
  • anonymous
Oh... so there's no function. Is this for precalc?
anonymous
  • anonymous
geometry :P
anonymous
  • anonymous
Oh okay! For some reason whenever I hear "arc length" I think of calculus. Here you go! http://www.worsleyschool.net/science/files/sector/calculations.html
anonymous
  • anonymous
okay thank u hahaha
anonymous
  • anonymous
how did u work it?
anonymous
  • anonymous
Click on the link and tell me how YOU would work it :-)
anonymous
  • anonymous
lol k thnx
anonymous
  • anonymous
Wait nm. I read the instructions too fast. not 6.94
anonymous
  • anonymous
125/360= 2.08 the you go 2*3.14*20=125.6?
anonymous
  • anonymous
First find the area of the entire circle. 2*pi*20 = 40pi Okay now divide 125degrees by 360 125/360 = 0.3472 Now multiply 0.3472 by 40pi Arc length = 0.3472*40*pi = 43.63 in
anonymous
  • anonymous
"125/360= 2.08" You must have accidentally divided 360 over 125.
anonymous
  • anonymous
oops okay thnk u so mcuh!
anonymous
  • anonymous
Sorry for the confusion :-)
anonymous
  • anonymous
Do you have to do anything involving finding area of a sector? B/c it looks like the link covers that as well.
Directrix
  • Directrix
Let x be the arc length in inches Then, 125 is to 360 as x is to the circumference of the circle 25/72 = x/(2*pi*20) 25/72 = x / 40*pi 72 x = 25(40 pi) x = (125/9) * pi
anonymous
  • anonymous
thank you

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