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moongazer

is this correct? please check my answer :)

  • one year ago
  • one year ago

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  1. moongazer
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    |dw:1344582621979:dw|

    • one year ago
  2. moongazer
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    find the area of sector I got (128pi)/9 but my book says 35.45 What is the correct answer?

    • one year ago
  3. moongazer
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    radius=8 \[\theta=80degrees\]

    • one year ago
  4. moongazer
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    I double checked it and I am always getting (128pi)/9 or 44.68

    • one year ago
  5. apple_pi
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    Area of sector = pi*r^2 * theta/360°

    • one year ago
  6. apple_pi
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    Sub in values: pi*8^2 * 80/360 = 128pi/9

    • one year ago
  7. apple_pi
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    I'm pretty sure you're correct

    • one year ago
  8. moongazer
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    maybe the book has a typo Isn't it that Area of sector = (1/2) (r^2) (theta) theta is in radians

    • one year ago
  9. moongazer
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    thanks :)

    • one year ago
  10. waterineyes
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    \[Area = \frac{1}{2} \times 64 \times 80 \times \frac{\pi}{180} \implies 44.65\]

    • one year ago
  11. waterineyes
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    Just trying..

    • one year ago
  12. moongazer
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    @waterineyes I think it should be 44.68 ? :)

    • one year ago
  13. waterineyes
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    Actually it can be: \[Area = 44.698\]

    • one year ago
  14. waterineyes
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    As value of \(\pi\) is not exact so you cannot say about the exact value..

    • one year ago
  15. waterineyes
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    Here we all are approximating this value..

    • one year ago
  16. moongazer
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    ohh ok I get it :)

    • one year ago
  17. waterineyes
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    Surely your book is carrying something wrong for this question.. You are right @moongazer

    • one year ago
  18. moongazer
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    Thanks :)

    • one year ago
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