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Second moment of area for octagon

  1. Jul 14, 2011 #1
    How do you find the second moment of area for a regular octagon with side length a? I know you can break it up into rectangles and triangles, but I cannot get my answers to match when I break it up different ways. The neutral axis is perpendicular to 2 parallel edges
     
  2. jcsd
  3. Jul 14, 2011 #2

    SteamKing

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    Show us yer calcs, and we can help you.
     
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