Annulus
Bipyramid
Circle
Dodecahedron
Elipse
Fractal
Gömböc
Heptagon
Isocahedron
Jack Truss
Kite
Lozenge
Möbius strip
Nonagon
Oval
Pentagon
Quadralateral
Rhombus
Square
Triangle
Undecagon
Vesica piscis
Wallis's conical edge
X-Shaped?
Yin-yang
Zig zag