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Math Help - Length of minor arc?

  1. #1
    Newbie Bluerabbits's Avatar
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    Exclamation Length of minor arc?



    I don´t know how to solve this with my calculator.

    I know that a piece of arc is 1/4 of the Circle´s circumference and that the circumference of the circle above is 6pi

    It says like this in my book:

    Arc MN = 40/360*

    And solve 360(ARc MN) = 240 pi

    Arc MN = 2pie/3

    My calculator is a TI-82 Stats from Texas Instruments the blue one: http://www.trion.si/ArtikelSlike/004253.jpg
    Last edited by Bluerabbits; August 2nd 2011 at 09:37 AM. Reason: Need to insert proper link for the picture
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  2. #2
    Senior Member abhishekkgp's Avatar
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    Re: Length of minor arc?

    Quote Originally Posted by Bluerabbits View Post


    I don´t know how to solve this with my calculator.

    I know that a piece of arc is 1/4 of the Circle´s circumference and that the circumference of the circle above is 6pi
    piece of arc is 1/4 of Circles circumference. This is not true in general.
    It says like this in my book:

    Arc MN = 40/360*

    And solve 360(ARc MN) = 240 pi

    Arc MN = 2pie/3

    My calculator is a TI-82 Stats from Texas Instruments the blue one: http://www.trion.si/ArtikelSlike/004253.jpg
    use the fact that the the length of the arc is = the angle subtented by the arc at the center(in radians) times the radius of the circle. after that just use \pi=3.14.
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  3. #3
    Newbie Bluerabbits's Avatar
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    Re: Length of minor arc?

    Thanks!
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  4. #4
    A riddle wrapped in an enigma
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    Re: Length of minor arc?

    Quote Originally Posted by Bluerabbits View Post


    I don´t know how to solve this with my calculator.

    I know that a piece of arc is 1/4 of the Circle´s circumference and that the circumference of the circle above is 6pi

    It says like this in my book:

    Arc MN = 40/360*

    And solve 360(ARc MN) = 240 pi

    Arc MN = 2pie/3

    My calculator is a TI-82 Stats from Texas Instruments the blue one: http://www.trion.si/ArtikelSlike/004253.jpg
    Hi Bluerabbits,

    You've already found the arc length. Are you looking for a formula that you can plug into your calculator?
    Attached Thumbnails Attached Thumbnails Length of minor arc?-length-arc.gif  
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  5. #5
    Newbie Bluerabbits's Avatar
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    Re: Length of minor arc?

    Hi! Thanx for the formula!
    Last edited by Bluerabbits; August 2nd 2011 at 10:21 AM. Reason: Misunderstanding
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