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Math Help - Perimeter of oval

  1. #1
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    Perimeter of oval

    Is there a way to calculate the perimeter of an oval with min. diameter 9 cm, and max. diameter 20 cm?
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by DarkLightA View Post
    Is there a way to calculate the perimeter of an oval with min. diameter 9 cm, and max. diameter 20 cm?
    Hi DarkLightA,

    The approximate circumference of an ellipse is given by the formula:

    C=2 \pi \sqrt{\frac{1}{2}(a^2+b^2})

    where

    a = half of the width diameter (referred to as semimajor axis)
    b = half of the length diameter (referred to as semiminor axis)

    Found here!
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    Thanks! That's awesome!
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