Straightening arc to line with exact length

yeah.

I did a quick test using an online calculator.

1m radius circle vs 24-gon (standard SU circle) vs 48-gon
here are the areas, perimeters and deviation percentages

  • Circle :
    area : 3.14159 m2
    perimeter : 6.28318 m

  • standard 24 sided circle :
    area : 3.10583 m2
    % margin : 1.14%
    perimeter : 6.26525 m
    % margin : 0.29%

  • standard 48 sided circle :
    area : 3.13263 m2
    % margin : 0.29%
    perimeter : 6.27870 m
    % margin : 0.07%


These result show that a standard 24-sided polygon is already really close to a circle. 1,14% difference of the area is really small.
And if you feel it’s not enough, simply by doubling the sides to 48, you get… well really, 0,29%, it’s a rounding error at this point.

Off course, if 0,29% is still too much for you, then you can still switch back to 2d tools. SU wasn’t designed for aerospace engineering :smiley: :smiley: