You can create any regular polygon by defining polygon's side number and side length or center length.. Click View, Geom Curve to toggle the display of individual curve.
To create a function curve:
Click Polygon (Curve toolbar) or click Geometry, Curve, Polygon.
In the dialog , define the side number and side length or check "Center Length" to define center length. If you want the polygon to be a single piecewise b-spline curve, check "Single Curve". You can also sketch polygons onto plane by checking "Sketch on Plane".
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