Question 966163
If the diameter of a circle that fits inside a polygon  is D and the length of 1 side of the polygon is L

how many sides S does the polygon have.?

I'm going to make a dovecote style birdbox.

I have boards that are 125mm(L) wide and I want the diameter of the box to be 350mm (D) how many sides will it need?
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Do the 125 mm pieces go outside the circle and tangent to it?