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Math Help - Find the arc length problem inquiry

  1. #1
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    Exclamation Find the arc length problem inquiry

    Hello,

    I'm studying for my pre-cal exam tomorrow and I'm not sure about a question...

    Find the length of an arc of a circle radius 8m if the arc subtends a central angle of 1 rad.

    I multiplied 1 rad by pi, and reasoned that Pi= 180 degrees

    Then I followed the formula, S= R*theta
    S= 8*180 degrees

    My answer was 1440.

    Usually, when an answer is this simple, I'm doing something completely wrong. How can I solve this problem?

    Thanks in advance.
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  2. #2
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    Re: Find the arc length problem inquiry

    Wait... is the answer 8... ?>.<?

    Oh man I'm so confused.
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  3. #3
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    Re: Find the arc length problem inquiry

    Quote Originally Posted by theadage;772757[B
    Find the length of an arc of a circle radius 8m if the arc subtends a central angle of 1 rad. [/B]

    The radian comes the idea that one radian subtends an arc of length one radius.
    Therefore, the arc has length 8m.
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  4. #4
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    Re: Find the arc length problem inquiry

    Thank you very much.
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