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anonymous

  • one year ago

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

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  1. anonymous
    • one year ago
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  2. jim_thompson5910
    • one year ago
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    None of these answer choices are correct. Is there something missing from one of them?

  3. anonymous
    • one year ago
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    ohhh they are missing the ^2

  4. jim_thompson5910
    • one year ago
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    on which ones?

  5. anonymous
    • one year ago
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    all of them

  6. anonymous
    • one year ago
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    is (10in)^2 on all of them

  7. jim_thompson5910
    • one year ago
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    how is the ^2 written? over the 37?

  8. jim_thompson5910
    • one year ago
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    oh ok

  9. jim_thompson5910
    • one year ago
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    what is the area of the entire circle? use this formula A = pi*r^2

  10. anonymous
    • one year ago
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    985.96?

  11. jim_thompson5910
    • one year ago
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    if r = 10, then r^2 = ??

  12. anonymous
    • one year ago
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    ohh wait my math was wrong. i didnt follow pemdas

  13. anonymous
    • one year ago
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    314 (putting pi as 3.14)

  14. jim_thompson5910
    • one year ago
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    don't replace pi with 3.14, leave pi as it is

  15. anonymous
    • one year ago
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    ahhhh ok hold on

  16. anonymous
    • one year ago
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    314.159..

  17. jim_thompson5910
    • one year ago
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    no it would just be 100pi

  18. jim_thompson5910
    • one year ago
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    think of pi as a variable

  19. anonymous
    • one year ago
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    oh ok

  20. jim_thompson5910
    • one year ago
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    now apparently, they didn't square the 10 to get 100 they left it as 10^2 so we'll have (10)^2*pi as part of the answer

  21. jim_thompson5910
    • one year ago
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    or pi*(10)^2

  22. jim_thompson5910
    • one year ago
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    `pi*(10)^2` is the area of the WHOLE circle we just want that pizza slice to get the area of that slice, we multiply by 37/360

  23. jim_thompson5910
    • one year ago
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    \[\Large \pi*(10)^2\times\frac{37}{360} = \frac{\pi\times(10)^2\times37}{360}\]

  24. jim_thompson5910
    • one year ago
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    example: say the angle is 90 degrees 90/360 = 1/4 so we take a quarter of the full area to get the slice area

  25. anonymous
    • one year ago
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    ahh.. so the answer is b?

  26. anonymous
    • one year ago
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    nooo its a. the things were written wrong. i see

  27. anonymous
    • one year ago
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    a) π(10in)^2 37 over 360 b) π(10in) 37 over 360 c) π(37in)^2 10 over 360 d) π(37in) 10 over 360

  28. jim_thompson5910
    • one year ago
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    ah I see now, thanks

  29. jim_thompson5910
    • one year ago
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    yeah it's definitely A

  30. anonymous
    • one year ago
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    yay thank you!!

  31. jim_thompson5910
    • one year ago
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    no problem

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