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Reply to "Turnarounds"

Oscar - why would you need to calculate this? I do not get the practical application you have in mind for this.

Anyway, if you know the radius or diameter of the circle on which points B and C lie, you can calculate the circumference easily enough, right? Then, using a graphics program - or even just eyeballing it - calculate or estimate the % the segment represents of the circumference. 

I could determine the % very closely in Corel Draw. However, in your diagram, it appears to me that the segment is about 20% of the circumference. If you then calculate 20% of the circumference, would this then not be accurate enough for your application?

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