Replies

1. 
   cadiddlehopper | Aug 25, 2006 06:26pm | #1

   Square 48 inches on each side; Circle 48 inches diameter inscribed inside square; 45-degree angles tangent to circle. Is this what you need to know?

   Cadiddlehopper

2. 
   BG | Aug 25, 2006 06:32pm | #2

   GW52,
   Not sure about HS...but, they are all 45 degree angles from the center. (8 times 45 = 360) then just connect the lines at 24" from the center...I thnk?

3. 
   AlanYoung | Aug 25, 2006 08:45pm | #3

   GW52

   I'm no geometric wiz-But I do have AutoCad!

   Roughly 19.88 length for the sides. Oppposite sides being 48" apart.

   Alan

   
1. 
   GW52 | Aug 25, 2006 09:15pm | #4

   Alan,

   Thanks for the reply, I seem to recall some type of math formula where you take the diameter and multiply it by some number... to get the dimension of 1 side and this is where the brain cells died!

   Thanks,

   Greg

   Edited 8/25/2006 2:42 pm ET by GW52

1. 
   Ed | Aug 26, 2006 03:03am | #5

   Greg -

    

   Construct a 48 x 48 square

   Find the center of the square by drawing diagonals.

   Measure distance "d" from a corner of the square to the center.  A large compass is best for this.

   Put the point of the compass on a corner, and mark off the distance "d" on both adjacent sides.  Do this with all four corners.  

   At each corner, draw a line through adjacent marks.

   There's your octagon. 

   Ed

    

    

    

    

1. 
   sparrow | Aug 26, 2006 05:41am | #6

   To add to what Ed gave as a method, if a calculator is handy (in case you don't have a large compass or trammel), take the measure of the side of your square (48" in this example), and divide it in half (eg., 48/2=24"). Then take this value (24") and multiply it by √2 (which is 1.4142...): 24" * √2 = 33.941", or 33-15/16". Finally, take this measure (which happens to be the same measure as the radius of the circle Ed mentioned in his method), and lay off this distance from each corner along each side of the square adjoining the corner. Each corner generates 2 marks, or 8 marks in total. On each side of the square, then, these marks will denote the corners of the octagon. Connect the marks and you're done.I hope that made sense. I can upload a diagram if that's of help to anyone.

2. 
   GW52 | Aug 28, 2006 04:26pm | #8

   Thanks,

   Greg

1. 
   cadiddlehopper | Aug 29, 2006 12:28am | #9

   Why all the mathematics??? Just put the lines on the panel. All that's needed is a piece of cardboard with holes 24 inches apart (or a trammel compass), a pin, a pencil, & a sliding square with a 45-degree angle on it. A yardstick may be handy since it is large. Find panel center, draw circle from center, draw lines tangent to circle 45 degrees from edges. That's it. No calculator needed.Cadiddlehopper

4. 
   QCInspector | Aug 26, 2006 10:38am | #7

   Tucked this site it my calculators folder in my bookmarks because sooner or later I would need it. Looks like youll benifit from it before I do.

   http://www.members.cox.net/ultimate_poker_table_top/Octagon%20Layout%20Calculator.html

5. 
   DanAlberta | Sep 01, 2006 06:08pm | #10

   An easy way to do it is to make a 48"square. Then make diagonal lines from corner to corner. Then use a scrap piece of wood that is the length of one corner to centre. Then go from one corner to adjacent corner. Go all the way around then just connect all the marks and start cutting.