Here is the way to figure any of these questions
For every side add 180 degrees, after 4 sides. example 6 sides....360(for
the four sides then 180 (for fifth side) + 180 (for sixth side) add
up...360 + 180 +180 r0 Now divide by number of sides....720/6
0...divide 120 in half because you are mitering 60 degrees.
Now let's try it on the 8 sided table.
360 for the square + 180 + 180 + 180 + 180 + 1080
1080/8= 135
135/2g.5 degrees If you flipp the board over it equals 22.5 degrees.
Geez you made that complicated. The simple equation to any sided table is
simply take the number of sides multiply by 2 and divide that number in to
360. Period.
More simply put, 360 divided by double the sides.
360/(4 sides x 2) = 45
360/(8 sides x 2) = 22.5
360/(60 sides x 2) = 3
I'm not sure which is more intriguing: the fact that the question was
brought up by a "woodworker", or the confusion it has engendered in this
thread...
Dave
 > > Here is the way to figure any of these questions
 > >
 > > For every side add 180 degrees, after 4 sides. example 6
 > > sides....360(for the four sides then 180 (for fifth side) + 180 (for
 sixth
 > > side) add up...360 + 180 +180 =720 Now divide by number of
 > > sides....720/6 =120...divide 120 in half because you are mitering 60
 > > degrees.
 >
 > Wrong
 >
 > A 6 sides table would require 30 degree cuts. 360/ (6 sides x 2) = 30
 >
 >

 180 / (number of sides) has always worked for me. What's with all the
 complicated equations??


Rube Goldberg ring a bell???

PDQ
That will work also but for me it is easier to remember 360 as that forms a
complete circle vs. a straight line. Actually 360 divided by the total
number of cuts works also.
of course not. The point was that someone, I'm not sure who, said that
the math was wrong. The math was absolutely correct. Understanding that
30 and 60 degree angles are complementary is necesarry for practical
application, but doesn't make his original statement incorrect.
Well in one of his examples his math was wrong.
He went on to give another examples of
Now let's try it on the 8 sided table.
360 for the square + 180 + 180 + 180 + 180 + 1080
1080/8= 135
135/2g.5 degrees If you flipp the board over it equals 22.5 degrees.
That does not add up. He adds 360+180+180+180+180+1080 which would normally
= 2160 not 1080.
A reasonable person would gibe an answer to the saw setting to come up with
the end result. He simply made this way too complicated for some one that
could not determine the answer in the first place. Typically and or at
least I was always taught to make the equasion as simple as possible. Why
not use a formula that gives the angle setting found on the saw?
Why not just divide 360 by the number of sides. This gives you the angle of
each joint. Mitre each side joint at half this angle and assemble.
8 sides = 360/8E
45/2".5
There, just mitre at 22.5 degrees.
Oldun
If you read higher up in the thread I made that same BASIC suggestion a few
days back. Actually I divide the sides by the number of end cuts needed.
More simply put, 360 divided by double the sides.
360/(4 sides x 2 end cuts) = 45
360/(8 sides x 2 end cuts) = 22.5
360/(60 sides x 2 end cuts) = 3
Actually it ONLY works for equilateral triangles and REGULAR polygons.
Try your method or his (same thing really) on a parallelogram, trapezoid
or rhombus and get back to us.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.