SymGon stands for Symmetrical PolyGon. The SymGon is a curve that generates symmetrical polygons like circles, n-sided regular polygons, stars and any other curve that is symetrical.
Create menu > Curves > SymGon
The main radius of the SymGon. This is the radius used by the circle and the n-sided polygon.
The second radious of the SymGon. This radius is used by the star.
The number of sides of the SymGon. A circle gets gets as many semi circular Bezier segments as sides. A star gets as many points as sides.
The shape of the SymGon.
Circle : Creates a circular shape.
Polygon : Creates a regular polygon.
Star : Creates a star.