3D shapes have faces (sides), edges and vertices (corners). Faces - A face is a flat or curved surface on a 3D shape. For example a cube has six faces, a cylinder has three and a sphere has just one.

This interior, with its unique shape, required a total rethinking of arena audio. Sphere Entertainment partnered with a company named Holoplot to design what it calls the world's most immersive 3D ...