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AcidRa1n

  • 2 years ago

Drawing.

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  1. AcidRa1n
    • 2 years ago
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    |dw:1338436072983:dw|

  2. AcidRa1n
    • 2 years ago
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    AB has 150 degrees. Whats the area of AOB?

  3. ChristineToTheRescue
    • 2 years ago
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    ...which one is o...i only see A, B, &C...

  4. AcidRa1n
    • 2 years ago
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    sorry !! O is the center

  5. AcidRa1n
    • 2 years ago
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    |dw:1338436524089:dw|

  6. ChristineToTheRescue
    • 2 years ago
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    okay... soo hold on

  7. ChristineToTheRescue
    • 2 years ago
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    |dw:1338436260093:dw|

  8. ChristineToTheRescue
    • 2 years ago
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    ...but angle a-b....

  9. ChristineToTheRescue
    • 2 years ago
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    |dw:1338436293890:dw| would the angel be something like that?...

  10. ChristineToTheRescue
    • 2 years ago
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    Sowwy, idk D: i hope someone else can help you...

  11. AcidRa1n
    • 2 years ago
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    |dw:1338436594595:dw|

  12. AcidRa1n
    • 2 years ago
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    awh ok :(

  13. ChristineToTheRescue
    • 2 years ago
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    very sorry.

  14. AcidRa1n
    • 2 years ago
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    Hey Satellite, can you help me?

  15. satellite73
    • 2 years ago
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    |dw:1338436556319:dw| this area?

  16. AcidRa1n
    • 2 years ago
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    Yeah!

  17. satellite73
    • 2 years ago
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    so total area if the radius is 4 is \(16\pi\) and you are missing a piece. the total number of degrees is 360 so you are missing a \(\frac{150}{360}\) of the circle leaving you with \(\frac{210}{360}=\frac{7}{12}\) of the circle

  18. satellite73
    • 2 years ago
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    your last job is to multiply \(16\pi\times \frac{7}{12}\)

  19. AcidRa1n
    • 2 years ago
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    Ah I dont understand :( I hate math so much..

  20. satellite73
    • 2 years ago
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    ok lets go slow

  21. satellite73
    • 2 years ago
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    radius of the circle is 4 right? i mean from the picture

  22. AcidRa1n
    • 2 years ago
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    When my teacher did it in class, it was much faster and more simple I just forget what he did..

  23. AcidRa1n
    • 2 years ago
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    yeah

  24. satellite73
    • 2 years ago
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    and the area of a circle with radius \(r\) is \(\pi r^2\) in this case \(\pi\times 4^2=16\pi\) so if a piece was not missing, the whole area would be \(16\pi\)

  25. AcidRa1n
    • 2 years ago
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    4 times 150 = 600.. 600 / 360 = 120 degrees?

  26. satellite73
    • 2 years ago
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    so the only question is, what portion of the circle is left

  27. satellite73
    • 2 years ago
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    hold on degrees is a measure of an angle. area measures something entirely different

  28. AcidRa1n
    • 2 years ago
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    Oh yeah im sorry

  29. AcidRa1n
    • 2 years ago
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    I was doing length

  30. satellite73
    • 2 years ago
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    the whole circle contains 360 degrees and you are missing 150 of them so you have left \(360-150=210\) degrees

  31. AcidRa1n
    • 2 years ago
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    It's Area im trying to find sorry

  32. satellite73
    • 2 years ago
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    therefore you have what portion of the whole circle left shaded? it is \[\frac{210}{360}=\frac{7}{12}\] i.e you have seven twelfth of the circle left shaded

  33. satellite73
    • 2 years ago
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    the entire circle has area \(16\pi\) and you have \(\frac{7}{12}\) of it left, so your area is \[16\pi\times \frac{7}{12}=\frac{28\pi}{3}\]

  34. AcidRa1n
    • 2 years ago
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    You know what excuse my language. flutter math. All you need in life is Add Subtract Multiply and Divide. No, i'm not going to be a engineer, so needing all of this is out of the question. This kind of stuff does not work well in my brain. I feel it's unfair that us less fortunate people have to pay the price. Bad grades and getting spanked. No matter what I do I just dont get this stuff, I try really hard. I've been studying for this final exam for about 5 hours now, and I probably learned nothing. This is a load of crap and it's not fair. Sorry for wasting you time with this problem i'll be going to sleep now do to its 12:15 am here. Thanks.

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