anonymous
  • anonymous
Circle A is shown with a central angle marked 37 degrees and the radius marked 10 inches. Which of the following could be used to calculate the area of the sector in the circle shown above? π(10in)237 over 360 π(10in)37 over 360 π(37in)210 over 360 π(37in)10 over 360
Geometry
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anonymous
  • anonymous
Circle A is shown with a central angle marked 37 degrees and the radius marked 10 inches. Which of the following could be used to calculate the area of the sector in the circle shown above? π(10in)237 over 360 π(10in)37 over 360 π(37in)210 over 360 π(37in)10 over 360
Geometry
chestercat
  • chestercat
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anonymous
  • anonymous
im a noob a math
anonymous
  • anonymous
*at*
jim_thompson5910
  • jim_thompson5910
Hint: area of slice = \(\LARGE \frac{x}{360}*\pi*r^2\) x is the angle in degrees r is the radius

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anonymous
  • anonymous
i don't understand how to use pi in equations
jim_thompson5910
  • jim_thompson5910
what I would do is pull out the pi and ignore it temporarily
jim_thompson5910
  • jim_thompson5910
In this case, x = 37 degrees and r = 10 if r = 10, then what is the value of r^2 ?
anonymous
  • anonymous
100
anonymous
  • anonymous
so x*r^2 is 3700?
anonymous
  • anonymous
someone help me
anonymous
  • anonymous
:(
jim_thompson5910
  • jim_thompson5910
so, \[\Large \frac{x}{360}*\pi*r^2 = \frac{37}{360}*\pi*10^2\] \[\Large \frac{x}{360}*\pi*r^2 = \frac{37}{360}*\pi*100\] then you can rearrange terms
jim_thompson5910
  • jim_thompson5910
hmm strange how none of the answer choices match
anonymous
  • anonymous
well i don't know which one
anonymous
  • anonymous
i asked one of my friends and he has no clue
jim_thompson5910
  • jim_thompson5910
can you post a screenshot of the full problem?
anonymous
  • anonymous
how im using a mac i don't know how
jim_thompson5910
  • jim_thompson5910
http://www.take-a-screenshot.org/ click on the "mac" tab to have the instructions shown
anonymous
  • anonymous
here?
anonymous
  • anonymous
wait
jim_thompson5910
  • jim_thompson5910
on the link I posted. They show the instructions on how to take a screenshot
anonymous
  • anonymous
it doesn't work i tried all of them
jim_thompson5910
  • jim_thompson5910
did you hold the command key and shift key, then press the "3" key? (the '3' over the 'w' and 'e') you should see a new pic file show up on your desktop
anonymous
  • anonymous
yes
jim_thompson5910
  • jim_thompson5910
ok post that by attaching the file (click the attach file button under the text box)
anonymous
  • anonymous
well no picture but i tried and it didn't work
jim_thompson5910
  • jim_thompson5910
the file name will be something like `Screen shot 2015-08-31 at 08.45.00 AM.png`
anonymous
  • anonymous
no its not working
jim_thompson5910
  • jim_thompson5910
ok nvm then
anonymous
  • anonymous
what do i do now with the equation?
jim_thompson5910
  • jim_thompson5910
sorry I don't know. None of the answer choices match what I wrote above, so I'm stumped. I think there's a typo maybe?
jim_thompson5910
  • jim_thompson5910
that's why I wanted to see the screenshot so I could see if anything was missing or not
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
yay
jim_thompson5910
  • jim_thompson5910
can you post an image of the answer choices as well?
anonymous
  • anonymous
only like that π(10in)237 over 360 π(10in)37 over 360 π(37in)210 over 360 π(37in)10 over 360
anonymous
  • anonymous
the question says: Which of the following could be used to calculate the area of the sector in the circle shown above?
jim_thompson5910
  • jim_thompson5910
does any of the answer choices have \(\Large 10^2\) in it?
anonymous
  • anonymous
the first 2
jim_thompson5910
  • jim_thompson5910
so choice B is \[\Large \frac{\pi(10^2)37}{360}\] ??
anonymous
  • anonymous
no lemme make that equation wait a sec
anonymous
  • anonymous
crud its not working its just pi*10*(37/360)
anonymous
  • anonymous
or the 2nd one just with 10^2 instead of 10
jim_thompson5910
  • jim_thompson5910
ok, so the "10" should be "10^2" because of the r^2 in pi*r^2
anonymous
  • anonymous
ok
anonymous
  • anonymous
look: π(10in^2)237 over 360 π(10in)37 over 360 π(37in^2)210 over 360 π(37in)10 over 360
anonymous
  • anonymous
are you here?
jim_thompson5910
  • jim_thompson5910
so strange, it shouldn't be 10in^2 it should be 10^2 in^2 maybe that's what they meant?

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