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anonymous

  • one year ago

Freddie is at chess practice waiting on his opponent's next move. He notices that the 4-inch-long minute hand is rotating around the clock and marking off time like degrees on a unit circle. Part 1: How many radians does the minute hand move from 3:35 to 3:55? (Hint: Find the number of degrees per minute first.) Part 2: How far does the tip of the minute hand travel during that time?

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  1. anonymous
    • one year ago
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    @phi @Hero

  2. anonymous
    • one year ago
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    @Nnesha

  3. anonymous
    • one year ago
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    @zzr0ck3r

  4. anonymous
    • one year ago
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    @sleepyjess @jigglypuff314 @jim_thompson5910

  5. sleepyjess
    • one year ago
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    First, how many degrees would the hand move in a full minute?

  6. anonymous
    • one year ago
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    360?

  7. anonymous
    • one year ago
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    @sleepyjess

  8. sleepyjess
    • one year ago
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    Yes! So if 60 seconds is 360 degrees, how many degrees would 20 seconds be?

  9. anonymous
    • one year ago
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    120

  10. sleepyjess
    • one year ago
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    Awesome! Do you know how to convert degrees to radians?

  11. anonymous
    • one year ago
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    one second

  12. anonymous
    • one year ago
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    2π/3

  13. sleepyjess
    • one year ago
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    Yes!

  14. sleepyjess
    • one year ago
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    That was the first part :) Now for the second part

  15. sleepyjess
    • one year ago
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    Do you know how to find circumference of a circle?

  16. anonymous
    • one year ago
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    yes , πd

  17. anonymous
    • one year ago
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    (pi * diameter)

  18. sleepyjess
    • one year ago
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    Yep, we know that the minute hand is 4 inches, so that would be the radius.

  19. anonymous
    • one year ago
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    so ( pi * 4 )

  20. anonymous
    • one year ago
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    ???

  21. anonymous
    • one year ago
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    @sleepyjess

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