This is PhD level work, and mathematics isn't really my thing, so thank you so much in advance if you can help me! I am trying to find the length of a curved fibre for a composites process I am working on. The fibre geometry is as follows: The length between 2 points is 200mm, but the fibre is curved by 4mm eccentricity. So from point a to b follows: the fibre curves by 4mm up here a __________________ b (200mm) with 4mm offset in the centre of the line, making the length greater than 200mm, but I don't know what that length is. I would also like to know what the radius of a circle with 4mm of circle curvature at the perimeter separated by 200mm is?