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360 degrees divided by the number of joints gives you the included angle (measured between two adjoining pieces). Divide the included angle by 2 to get the cut angle for your mitre saw setting.

Ed
 

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Cabinetmaker
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Ent; the included angle is 45 degrees therefore the MITER angle is 22.5
JackM.

8 sides divided into 360 degrees equals 45 degrees. 45 divided by 2 to get miter angle equals 22.5:yes:
 

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hexagon=6 sides and an octagon=8 sides, so you said hexagon 360/6=60, then as said before, you divide that by 2 to get each side miter, which is 30 degrees.
 

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Cabinetmaker
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Mr Real: OOPPPPPPPPPPPPPPS OK well here in NJ we never said we wuz smart:no::laughing::thumbsup: Brain was not communicating with mouth. However at least original poster can see the math involved, shure hope he gotz more brain cells than I do LOL LOL LOL
JackM
 

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Always go the safe way here. Supply the math, let the user supply the answer.
 

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I have one of those "incra" mitre gauges and whilst using today i noticed that there is a little quick refrence to different angle cuts on it, very handy!

Remembered this post and yes, it is 30 degrees :laughing:

I aint clever either, but i can read correctly...
 
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