Hi all. I’m trying to obtain a circular surface with a radius 0.5 m. To obtain that, I have drawn a circle and then trimmed the circle to obtain four quarter arcs. Then, I have used the button of Surface from network of curves by selecting the four quarter arcs. It gave me a circular surface. However, it is not exacty a circular surface. When I have drawn a line from the center to the circumference, the length of the line changes as 0.49 to 0.51 which is not 0.5 and I understand that it is not exactly a circular NURBS surface.

Maybe draw a line whose length is the circle radius and then use Revolve about one endpoint? (if you are looking for a surface with a circular NURBS structure)

Otherwise, drawing a circle and using PlanarSrf as Tone suggests above is the way.

Hi @kahasim
Could this be a tolerance thing? I just tried the same thing, and the radius stays 0.5 as expected. What are your tolerance settings?
-Jakob