How To..

[A.alnakkas]

Measure the curve of a dagger?

Silly question, but I have no idea how to do it!

[PUFF]

To get a curvature...
You may easily get the distance between two ends of the arc (chord) and the Segment Height, measured from the arc to a line between two ends.
These two parameters are enough for calculating of the arc 's radius.
http://www.1728.org/circsect.htm

[A.alnakkas]

Thanks alot PUFF!