geomerty

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Find the arc legnth of Arc AB. Leave your answer in terms of pi.
arc is 45 degrees radius is 5

  • geomerty -

    45/360 = .125
    or 1/8 of the circumference

    circumference = 2 pi r = 2 pi (5) = 10 pi

    so 10 pi/8 = (5/4) pi = 1.25 pi

  • geomerty -

    the answers I have to pick from are
    6 pie 8 units
    3 pi 4 units
    9 pi 4 units
    9 pi 8 units

    so is 9 pi 8 units the answer

  • geomerty -

    Well I get 10 pi/8 which is 5 pi/4

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