Simple math? - Home Theater Forum and Systems - HomeTheaterShack.com

Old 09-21-10, 07:01 PM Thread Starter
Elite Shackster

bambino

Join Date: Feb 2010
Location: Iowa
Posts: 4,418
Simple math?

You would think so but i've been messing around with it all day in my head, now i've got my Miter saw out and still can't get it i know someone here has the answer without even thinking about it so here it is.

If a 4 sided mitered box has a 45 degree angle what would the angle be for a hexagon shaped box? If someone has the answer and how they came to it my brain thanks you.
Thanks, Bambino.
bambino is offline

Old 09-21-10, 07:55 PM
Plain ole user

Tech Guru

Join Date: May 2006
Location: Gainesville, FL, USA
Posts: 11,121
Re: Simple math?

The interior angles of a hexagon are 120 degrees. I would assume you would want mitre angles of half that.

Looking for me, just google my username. I have used the same one for most sites for many years.
lcaillo is offline
Old 09-21-10, 08:46 PM Thread Starter
Elite Shackster

bambino

Join Date: Feb 2010
Location: Iowa
Posts: 4,418
Re: Simple math?

Thanks lcaillo, after messing around on the saw some more with different angles i got 30 degree's as my cut angle for the Hex shape.
Just out of curiousity, where did you get the 120 degree angle? Common knowledge or math?
Thanks again, Bambino
bambino is offline
Old 09-22-10, 12:28 AM
Elite Shackster
Maverick

Join Date: Mar 2007
Location: Sandnes, Norway
Posts: 1,377
Re: Simple math?

For a hexagon the angles are 60 degrees for every angle.

360 degrees for the full circle, divided by as many sides your shape has. For a 6-sided shape that is 360/6=60 degrees. You want to mitre both edges, so divide by two and you get 30 degrees.

lcaillo made it out to 120 degrees, which is equally right, just a matter of how you view the angle. If you look at it as an 'open' angle : _/ or a 'closed' angle: <
It's all down to what you use as a reference. But my math give you the miter angle direct, lcaillo's will have to be divided again by two to give you the correct angle of the saw. :-) We are both right, in a sense, which makes math fascinating.
atledreier is offline
Old 09-22-10, 07:45 AM
HTS Senior Moderator

Join Date: Sep 2008
Location: Newcastle Australia
Posts: 5,624
Re: Simple math?

I was looking at making an eight sided box before I built my tube and researching the design I found that they make router bits to cut edges on, 4, 6, 8 and 10 sided boxes. (possibly more)

Silence is golden but duct tape is silver.

DIY completed:
http://www.hometheatershack.com/foru...-shelf.html
robbo266317 is offline
Old 09-22-10, 09:48 AM
Shackster

Join Date: Sep 2010
Posts: 67
Re: Simple math?

Here's another way.........

For the cut angle (not the assembled angle), take 180 degrees and divide it by the number of turns you want.

So:

Triangle - 180/3 = 60 degrees
Square - 180/4 = 45 degrees
Pentagon - 180/5 = 36 degrees
Hexagon - 180/6 = 30 degrees

etc. etc.

An old carpenter's trick I learned.

Carl

 Bookmarks

 Tags math? , simple

Message:
Options

## Register Now

Random Question
Random Question #2

User Name:
OR

## Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.