3D shapes that are non-polyhedral include cylinders close cylinder A 3D shape with a constant circular cross-section across its length., cones close cone A 3D with a flat at the bottom and a ...

Rings are available in many cross-sectional shapes, but the most common have rectangular or round cross sections. Rectangular-section rings are made for internal or external applications.

Shapes range from simple squares with rounded corners to complex, nonsymmetrical shapes. Simpler cross-sections are formed in a single draw; more complicated ones usually require three or more ...

Slice a snake open, and the cross-sectional shape the body makes is reminiscent of a UFO from the classic Space Invaders arcade game. It’s not a shape conventionally regarded as aerodynamic ...