Going to build an Octagon (8 sided)

[mb77tyson]

I am going to build a small deck-like structure around my flagpole, it should be as round as possible, but I am thinking of making it 8-sided for simplicity.

Now I wonder if there is a good function online where I can calculate the angles and measurements I should use for the outer frame. If I want a certain diameter.

I hope you understand my question.

Best regards,
Marcus

 

[Robert-san01]

The angles remain the same regardless of the size of the ring. 360/8.

 

[verktygsgurun]

360/8 = 45
45/2 = 22.5 (if it shall be added together)

 

[panodil]

The sum of angles in an octagon is 1080 degrees. Each angle is therefore 1080/8=135 degrees.

 

[Kaffeperkulator]

The angle is, as previously mentioned, 135 degrees at each junction, and each side's length is approximately 0.38 times the length of the diameter.
Or if you prefer, the diameter is approximately 2.613 times the length of the sides.

 

[Kaffeperkulator]

Regarding the angle sum, it is in a polygon with n number of corners (n-2)*180.

 

[Kaffeperkulator]

And if you want it even simpler, just google octagon calculator and you'll find pages where you enter the desired value.

 

[mb77tyson]

Ha ha!! There I have to think about it! Thanks for all the answers, of course the angle is always the same, it goes without saying in retrospect 😜😜

 

[AXS]

Can make a drawing if you need, just put in a sketch with the measurements you know you want, and I'll do the rest.

 

[mb77tyson]

I used this:
http://www.liljedahl.info/projects/octagon_calculator/
Super good!

Thanks everyone! 👍👍