Mitre question???

[JAKE]

I want to make an 8 sided table top. What would he mitre angle be for the skirting?

[David]

Tell me you are kidding.

Dave

[Leon]

22.5

[John "The Toymaker" Gilham]

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.

Now let's try it on the 8 sided table.

360 for the square + 180 + 180 + 180 + 180 + 1080

1080/8= 135

[Leon]

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

[Leon]

A 6 sides table would require 30 degree cuts. 360/ (6 sides x 2) = 30

[David]

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

[Guess who]

Asked and answered just recently, so my first impression was that this is a troll. A Google would bring the result. However, since it has been answered several ways, I'll suggest yet another method, still based on the same principles.

8 sides = 8 triangles to the center. The center angle is then divided 8 ways = 360/8 = 45 Each triangle has two angles at the outside that are equal, and the angles in a triangle add to 180, so they add to 180 - 45 = 135. Being equal, they are each 67.5 degrees.

Do the same sort of calculation for any number of sides [oteh thsan

8.]

[gw]

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

[John]

If the table top is accurately cut, then 22.5degrees

John

[Guess who]

That will work. The math is how to get there.

[Battleax]

As you can see by using math you've come up with a completly wrong answer. By using common sense the angle for the skirt cuts would be 22.5. This is not rocket science.

[Secret Squirrel]

"Leon" wrote in news:Qy9De.366$P [e-mail]:

Which of course is the same thing. 30 and 60 degree angles are complimentary.

[Secret Squirrel]

"Battleax" wrote in news: [e-mail]:

Which as I mentioned to another poster is the same thing.

22.5 and 67.5 are complimentary angles. It's just a matter of which side of the line you're cutting.

[Duane Bozarth]

Secret Squirrel wrote: ...

And on top of liking each other, they're "complementary" in forming a right angle... :)

[Duane Bozarth]

Secret Squirrel wrote: ...

You've the wrong "compliment" here (BTW, I didn't post until after I read the second time, just to be sure...). :)

Angles are "complementary", we give each other "compliments" for good work, etc., ... :)

[John McCoy]

[e-mail] (JAKE) wrote in news:19918-42DD0C96-850@storefull-

3134.bay.webtv.net:

As stated, this question cannot be answered, as there are infinitely many possible arrangements of 8 sides which result in a closed surface.

However, assuming that what you really meant was "I want to make an octagonal table top", the answer is 22 1/2 degrees.

John

[PDQ]

| > > 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 =3D720 Now divide by number of | > > sides....720/6 =3D120...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) = =3D 30 | >

| >

|=20 | 180 / (number of sides) has always worked for me. What's with all the | complicated equations?? |=20 |=20

Rube Goldberg ring a bell???

--=20 PDQ

[Leon]

Actually you probably are not going to find a 60 degree setting on any saw. So uh you would set to 30 degrees.

[Leon]

And I will mention again that you will not find 67.6 degrees on your saw.