Replies

1. 
   BG | Mar 29, 2004 04:17am | #1

   jaytran,

   Assuming your triangles sides are all the same length...each angle of the triangle would be 60 degrees...ie. 180 degrees in a triangle..

   
   

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   Edited 3/28/2004 9:20 pm ET by BG

1. 
   JayTran | Mar 29, 2004 05:17am | #2

   BG,

     I need to know the miter angle of the side piece edges, where the joint will be, I,m not concerned about the corner angle. I hope I am being clear. Thanks for the input though.

1. 
   goldhiller | Mar 29, 2004 07:59am | #3

   http://www.josephfusco.ORG/Articles/Dihedral/Dihedral.html

   Knowledge is power, but only if applied in a timely fashion.

2. 
   AlanWS | Mar 29, 2004 10:55pm | #5

   On a slightly different page at the site given by goldhiller, there is a calculator for exactly this sort of problem:

   http://www.josephfusco.org/Calculators/Advanced_Box_Cutter.html

   (The page he gave is the explanation of how this works.)

   Just enter the number of sides (4), the base length (10), and the height (8), and it tells you to tilt the blade to 36.84 degrees to miter the edges. You will get the right angle for your triangular sides with the miter gauge set to 62.08 degrees. (That would be the corner angle you don't really need.) If you want to make the bottom edges sit flat on a table, it also tells you to tilt the blade to 32.01 degrees for that.

2. 
   maddog3 | Mar 29, 2004 09:57pm | #4

   This is weird, I just finished up trying this exact problem, if you are asking about the angles and bevels to make a 45 degree pyramid try these,set the bevel / tilt to 30 degrees and set the miter at 35.5 degrees, this will give you a 45 degree slope on 4 sides. Of course I know now that trying to find those EXACT marks is not easy , but then nothing is ! This worked for me but it seems that the length of the base was dependent on the capacity of my miter saw to cut the width of board , does that make any sense? I suppose if you use a table saw then it will not matter

   
   

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   Edited 3/29/2004 3:20 pm ET by maddog