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 ...

The cross-section of the prism is a right-angled triangle with side-lengths 3 cm, 4 cm and 5 cm. The prism is 6 cm long. The net is made up of two right-angled triangles and three rectangles.