Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Show us yer calcs, and we can help you.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook