anonymous
  • anonymous
@dumbcow
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
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dumbcow
  • dumbcow
oh ok, same formula...but now we have to move things around because we want the angle not the arc \[arc = r* \frac{\text{\angle}}{180} \pi = (\frac{\pi r}{180}) \text{\angle}\] by multiplying by reciprocal we can get "angle" by itself \[\text{\angle} = (\frac{180}{\pi r})*arc\]
dumbcow
  • dumbcow
now try plugging in arc of 6pi, and r of 8 \[Angle = \frac{180}{8\pi}* 6\pi\]

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anonymous
  • anonymous
I get 135...
dumbcow
  • dumbcow
correct
anonymous
  • anonymous
So it would be none of the above?
dumbcow
  • dumbcow
yep
anonymous
  • anonymous
Thank you bunny much (: (\/) (. .) c(")(")
dumbcow
  • dumbcow
nice
anonymous
  • anonymous
Are you good at finding the area of a circle? I've forgotten
dumbcow
  • dumbcow
yes \[Area = \pi* r^2\]
anonymous
  • anonymous
Ok so it's giving me diameter... what's the formula then?
anonymous
  • anonymous
@dumbcow ? :c
anonymous
  • anonymous
Cause I tried just pi times the diameter and it wasn't right...
dumbcow
  • dumbcow
right pi * diameter will give you circumference you need to know how to convert diameter to radius ----> r = d/2 easy radius is half the diameter \[A = \pi r^2 = \pi (\frac{d}{2})^2\]
anonymous
  • anonymous
When I fill it in my answer doesn't correlate with the answer options.
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dumbcow
  • dumbcow
oh well thats because they want area of blue part, NOT the circle :) what did you get for circle?
anonymous
  • anonymous
176.625
dumbcow
  • dumbcow
good ok you have to subtract this from area of square
anonymous
  • anonymous
So how do I find that?
dumbcow
  • dumbcow
find area of square with side length of 15
anonymous
  • anonymous
Okay, I got it. Thank you c:
dumbcow
  • dumbcow
np
anonymous
  • anonymous
Would you help me with some more math stuff? lol
dumbcow
  • dumbcow
sure but i need to get off in 15 min or so
anonymous
  • anonymous
Okay o:

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