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Geometery help.

Discussion in 'Off Topic [BG]' started by Toasted, Jun 29, 2005.


  1. Toasted

    Toasted

    May 26, 2003
    Leeds, UK
    If a circle has a diameter of 15cm, what is the length of each side of a regular octogon that fits within the same circle?
     
  2. dlloyd

    dlloyd zzzzzzzzzzzzzzz

    Apr 21, 2004
    Scotland
    5.74cm

    Edit:

    Think of it as eight identical isosceles triangles (with sides AB=AC=7.5cm and angle BAC=45 degrees) joined together at angle BAC.

    sin(45/2)=(BC/2)/7.5
     
  3. Toasted

    Toasted

    May 26, 2003
    Leeds, UK

    Are you sure? Because if not all the easter eggs you buy from tesco are going to fall over in their boxes? yes, its that important.
     
  4. dlloyd

    dlloyd zzzzzzzzzzzzzzz

    Apr 21, 2004
    Scotland
    I don't shop at Tescos. But, yes, I'm 100% sure.

    I even drew one in powerpoint to check...

    [​IMG]

    Edit: Are you sure you wanted the octagon inside the circle?
     
  5. Toasted

    Toasted

    May 26, 2003
    Leeds, UK
    Yup. Thanks David :) That's much appreciated :)
     
  6. Brad Barker

    Brad Barker Supporting Member

    Apr 13, 2001
    berkeley, ca
    yeah, checked it myself. it's good. (the next digit is 0, so the rounding is even more accurate than i'd expected.)

    looks like those eggs will be sittin' pretty. :cool:
     
  7. dlloyd

    dlloyd zzzzzzzzzzzzzzz

    Apr 21, 2004
    Scotland
    What are you doing with easter eggs anyway?
     
  8. DigMe

    DigMe

    Aug 10, 2002
    Waco, TX
    What if you stack the eggs? What if they're duck eggs? Huh? HUH? Answer that, Poindexter!

    brad cook
     
  9. cheezewiz

    cheezewiz

    Mar 27, 2002
    Ohio
    Who cares? Real people don't need geometry. (Unless they are engineers or other geeky types)
     
  10. Hollow Man

    Hollow Man Supporting Member

    Apr 28, 2003
    Springfield, VA
    I'm an electrical engineer, and I use geometry all the time. :p

    Of course, the next time my boss asks me to cram an octagon into a sphere, I'm outta here.
     
  11. Hey! I'm married to an engineer. She may be a geek, but she is a kick@ss stride piano player. I thought I'd be able to demonstrate that some of us in the Colonies have an education, but David beat me to it. Have you discussed the octagonal egg cross section with the hens. Mine would be quite disturbed to be informed about that modification.
     
  12. DigMe

    DigMe

    Aug 10, 2002
    Waco, TX
    I think it's ok to know geometry. The main thing is just to avoid putting all your eggs in one basket.

    :ninja:

    brad cook
     
  13. Brad Barker

    Brad Barker Supporting Member

    Apr 13, 2001
    berkeley, ca
    in my high school calc class, when we were covering the mean value theorem for derivatives, the teacher gave us an example of cops using it to catch drivers speeding.


    i did not believe that this was an actual practice.


    so, can you settle this for once and for all? :D
     
  14. cheezewiz

    cheezewiz

    Mar 27, 2002
    Ohio
    LOL! Nah..it's not actual practice. I just use a radar gun when I write the rare speeding ticket.

    For the record, there is nothing wrong with geometry. I just always sucked at math so I must make fun of those who don't.
     
  15. Brad Barker

    Brad Barker Supporting Member

    Apr 13, 2001
    berkeley, ca
    i figured as much. :D

    i figured as much. :D
     
  16. dlloyd

    dlloyd zzzzzzzzzzzzzzz

    Apr 21, 2004
    Scotland
    Heh! You just feel inadequate compared to us manly types who can integrate a function. Erm, or something. :meh:

    :)