I'm going to make an octagon around a round column using crown moulding and want to know how to determine the angle to use on the mitre box. Let's just say for this example the column is 12" round.
I can somewhat figure out that it is probably half of a 45degree angle used for 90degree inside/outside mitres on 90degree walls, and making the same angled mitred cuts on both ends should get me the results i'm looking for.
Q#2: If it was previously done and one section needed to be replaced how are the mitres degrees,angles determined for the piece being replaced.
Is their a tool that will give me the angle?
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