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Unofficialllyy

  • one year ago

A Ferris wheel car moves from point C to point D on the circle shown below:

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  1. Unofficialllyy
    • one year ago
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  2. Unofficialllyy
    • one year ago
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    What is the arc length the car traveled, to the nearest hundredth?

  3. Unofficialllyy
    • one year ago
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    A. 7.91 feet B. 8.32 feet C. 10.99 feet D. 11.89 feet

  4. anonymous
    • one year ago
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    set up a proportion with the ratio of the angle to 360 on one side, equalling the unknown arc length over 2pi*r

  5. welshfella
    • one year ago
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    or you can use arc length = radius * angle in radians

  6. anonymous
    • one year ago
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    angle's in degrees tho

  7. welshfella
    • one year ago
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    radians = degrees * pi/180

  8. anonymous
    • one year ago
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    proportion is easier don't bother messing with radians

  9. welshfella
    • one year ago
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    well the above is also useful to know

  10. Unofficialllyy
    • one year ago
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    How do I find the radius?

  11. welshfella
    • one year ago
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    d you are given the diameter = 30 ft

  12. Unofficialllyy
    • one year ago
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    Right

  13. welshfella
    • one year ago
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    have you got the answer

  14. Unofficialllyy
    • one year ago
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    How do I get the radius when I am given the diameter?

  15. welshfella
    • one year ago
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    by prossi's method we have 42/ 360 = x / 2pi * 15 or using radians x = 15 * 42 * pi/180

  16. welshfella
    • one year ago
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    radius = half of the diameter

  17. Unofficialllyy
    • one year ago
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    I got it, It's 10.99 feet

  18. welshfella
    • one year ago
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    right

  19. Unofficialllyy
    • one year ago
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    thank you :)

  20. welshfella
    • one year ago
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    i think the radians method is slightly easier

  21. Unofficialllyy
    • one year ago
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    Me too, that's the one I used

  22. welshfella
    • one year ago
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    yw

  23. welshfella
    • one year ago
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    all you need remember is that pi radians = 180 degrees

  24. welshfella
    • one year ago
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    so to convert degrees to radians you multiply by pi/180 and for the reverse you multiply by 180/pi

  25. Unofficialllyy
    • one year ago
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    Right

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