Had a friend ask me if there was a formula for calculating the length of a side of a 4" octagon- (4" side to side, not point to point).
Told him I didn't know but I would draw it in my CAD program and that would get him close enough. So I sent him this drawing but now I'M wondering if there is a way to calculate it. I used to be pretty good with geometry but that is now a fer piece back.
Anybody know? (I fear it's going to be simple and I'll have a DOH! moment)
Octagon.jpg